missing items always in the top

src/main/java/com/glodblock/github/client/gui/GuiFluidCraftConfirm.java

@@ -20,10 +20,7 @@ import com.glodblock.github.network.CPacketSwitchGuis;
 import com.glodblock.github.util.ModAndClassUtil;
 import com.google.common.base.Joiner;
 import java.text.NumberFormat;
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.LinkedList;
-import java.util.List;
+import java.util.*;
 import net.minecraft.client.gui.GuiButton;
 import net.minecraft.entity.player.InventoryPlayer;
 import net.minecraft.item.ItemStack;
@@ -380,10 +377,27 @@ public class GuiFluidCraftConfirm extends AEBaseGui {
                 is.setStackSize(amt);
             }
         }
-
+        this.sortItems();
         this.setScrollBar();
     }
 
+    Comparator<IAEItemStack> comparator = (i1, i2) -> {
+        if (missing.findPrecise(i1) != null) {
+            if (missing.findPrecise(i2) != null) return 0;
+            return -1;
+        } else if (missing.findPrecise(i2) != null) {
+            return 1;
+        } else {
+            return 0;
+        }
+    };
+
+    private void sortItems() {
+        if (!this.missing.isEmpty()) {
+            this.visual.sort(comparator);
+        }
+    }
+
     private void handleInput(final IItemList<IAEItemStack> s, final IAEItemStack l) {
         IAEItemStack a = s.findPrecise(l);