diff --git a/src/main/java/com/viper/autosortchest/Main.java b/src/main/java/com/viper/autosortchest/Main.java
index f57484b..4b181f5 100644
--- a/src/main/java/com/viper/autosortchest/Main.java
+++ b/src/main/java/com/viper/autosortchest/Main.java
@@ -1819,6 +1819,30 @@ public class Main extends JavaPlugin implements Listener, CommandExecutor, org.b
         return attachedBlock.equals(chestBlock);
     }
 
+    /**
+     * Erzwingt: pro Container (Truhe/Fass, inkl. DoubleChest-Hälften) genau ein ASC-Schild.
+     *
+     * @param containerBlock   Truhe/Fass-Block
+     * @param ignoreSignBlock  optionales Schild, das ignoriert wird (z.B. gerade platziertes Schild)
+     */
+    private boolean hasAscSignOnContainer(Block containerBlock, Block ignoreSignBlock) {
+        if (containerBlock == null || !isContainer(containerBlock)) return false;
+
+        for (Block b : getContainerBlocks(containerBlock)) {
+            for (Block face : adjacentFaces(b)) {
+                if (ignoreSignBlock != null && face.equals(ignoreSignBlock)) continue;
+                if (!(face.getState() instanceof Sign otherSign)) continue;
+                if (!isSignAttachedToChest(face, b)) continue;
+
+                String l0 = ChatColor.stripColor(otherSign.getLine(0) != null ? otherSign.getLine(0) : "");
+                if (l0.equalsIgnoreCase("[asc]") || isAnyCleanSign(otherSign)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
     private void addInputChestLocation(UUID playerUUID, Location location) {
         String basePath = "players." + playerUUID + ".input-chests";
         String id       = UUID.randomUUID().toString();
@@ -3043,6 +3067,11 @@ public class Main extends JavaPlugin implements Listener, CommandExecutor, org.b
             return true;
         }
 
+        if (hasAscSignOnContainer(targetBlock, null)) {
+            player.sendMessage("§cAn diesem Behälter ist bereits ein ASC-Schild!");
+            return true;
+        }
+
         // ── 2. Typ normalisieren ─────────────────────────────────────────────
         String typRaw = args[1].toLowerCase();
         switch (typRaw) {
@@ -3379,20 +3408,10 @@ public class Main extends JavaPlugin implements Listener, CommandExecutor, org.b
                 if (isContainer(attachedBlock)) chestBlock = attachedBlock;
             }
             if (chestBlock == null) { player.sendMessage(getMessage("no-chest-near-sign")); return; }
-            // Prüfe, ob bereits ein ASC-Schild an der Truhe oder am Fass ist
-            java.util.List<Block> blocksToCheck = getContainerBlocks(chestBlock);
-            for (Block cb : blocksToCheck) {
-                for (org.bukkit.block.BlockFace face : org.bukkit.block.BlockFace.values()) {
-                    Block relative = cb.getRelative(face);
-                    if (relative.getState() instanceof org.bukkit.block.Sign otherSign) {
-                        String l0 = org.bukkit.ChatColor.stripColor(otherSign.getLine(0) != null ? otherSign.getLine(0) : "");
-                        if (l0.equalsIgnoreCase("[asc]") || isAnyCleanSign(otherSign)) {
-                            player.sendMessage("§cAn diesem Behälter ist bereits ein ASC-Schild!");
-                            event.setCancelled(true);
-                            return;
-                        }
-                    }
-                }
+            if (hasAscSignOnContainer(chestBlock, signBlock)) {
+                player.sendMessage("§cAn diesem Behälter ist bereits ein ASC-Schild!");
+                event.setCancelled(true);
+                return;
             }
             // Limit-Check: Kein Rang = keine Truhe
             if (chestLimitsEnabled && getChestLimitForPlayer(player, "input") == 0
@@ -3428,20 +3447,10 @@ public class Main extends JavaPlugin implements Listener, CommandExecutor, org.b
                 if (isContainer(attachedBlock)) chestBlock = attachedBlock;
             }
             if (chestBlock == null) { player.sendMessage(getMessage("no-chest-near-sign")); return; }
-            // Prüfe, ob bereits ein ASC-Schild an der Truhe oder am Fass ist
-            java.util.List<Block> blocksToCheck = getContainerBlocks(chestBlock);
-            for (Block cb : blocksToCheck) {
-                for (org.bukkit.block.BlockFace face : org.bukkit.block.BlockFace.values()) {
-                    Block relative = cb.getRelative(face);
-                    if (relative.getState() instanceof org.bukkit.block.Sign otherSign) {
-                        String l0 = org.bukkit.ChatColor.stripColor(otherSign.getLine(0) != null ? otherSign.getLine(0) : "");
-                        if (l0.equalsIgnoreCase("[asc]") || isAnyCleanSign(otherSign)) {
-                            player.sendMessage("§cAn diesem Behälter ist bereits ein ASC-Schild!");
-                            event.setCancelled(true);
-                            return;
-                        }
-                    }
-                }
+            if (hasAscSignOnContainer(chestBlock, signBlock)) {
+                player.sendMessage("§cAn diesem Behälter ist bereits ein ASC-Schild!");
+                event.setCancelled(true);
+                return;
             }
             // ── Limit-Pruefung: Rest-Truhe ─────────────────────────────────────
             if (chestLimitsEnabled) {
@@ -3506,20 +3515,10 @@ public class Main extends JavaPlugin implements Listener, CommandExecutor, org.b
                 if (isContainer(attachedBlock)) chestBlock = attachedBlock;
             }
             if (chestBlock == null) { player.sendMessage(getMessage("no-chest-near-sign")); return; }
-            // Prüfe, ob bereits ein ASC-Schild an der Truhe oder am Fass ist
-            java.util.List<Block> blocksToCheck = getContainerBlocks(chestBlock);
-            for (Block cb : blocksToCheck) {
-                for (org.bukkit.block.BlockFace face : org.bukkit.block.BlockFace.values()) {
-                    Block relative = cb.getRelative(face);
-                    if (relative.getState() instanceof org.bukkit.block.Sign otherSign) {
-                        String l0 = org.bukkit.ChatColor.stripColor(otherSign.getLine(0) != null ? otherSign.getLine(0) : "");
-                        if (l0.equalsIgnoreCase("[asc]") || isAnyCleanSign(otherSign)) {
-                            player.sendMessage("§cAn diesem Behälter ist bereits ein ASC-Schild!");
-                            event.setCancelled(true);
-                            return;
-                        }
-                    }
-                }
+            if (hasAscSignOnContainer(chestBlock, signBlock)) {
+                player.sendMessage("§cAn diesem Behälter ist bereits ein ASC-Schild!");
+                event.setCancelled(true);
+                return;
             }
             if (chestLimitsEnabled) {
                 int maxInput = getChestLimitForPlayer(player, "input");
@@ -3597,20 +3596,10 @@ public class Main extends JavaPlugin implements Listener, CommandExecutor, org.b
                 if (isContainer(attachedBlock)) chestBlock = attachedBlock;
             }
             if (chestBlock == null) { player.sendMessage(getMessage("no-chest-near-sign")); return; }
-            // Prüfe, ob bereits ein ASC-Schild an der Truhe oder am Fass ist
-            java.util.List<Block> blocksToCheck = getContainerBlocks(chestBlock);
-            for (Block cb : blocksToCheck) {
-                for (org.bukkit.block.BlockFace face : org.bukkit.block.BlockFace.values()) {
-                    Block relative = cb.getRelative(face);
-                    if (relative.getState() instanceof org.bukkit.block.Sign otherSign) {
-                        String l0 = org.bukkit.ChatColor.stripColor(otherSign.getLine(0) != null ? otherSign.getLine(0) : "");
-                        if (l0.equalsIgnoreCase("[asc]") || isAnyCleanSign(otherSign)) {
-                            player.sendMessage("§cAn diesem Behälter ist bereits ein ASC-Schild!");
-                            event.setCancelled(true);
-                            return;
-                        }
-                    }
-                }
+            if (hasAscSignOnContainer(chestBlock, signBlock)) {
+                player.sendMessage("§cAn diesem Behälter ist bereits ein ASC-Schild!");
+                event.setCancelled(true);
+                return;
             }
             event.setLine(0, getSignColor("target", "line1") + "[asc]");
             event.setLine(1, getSignColor("target", "line2") + lines[1]); // "ziel" oder "target" beibehalten