Update app.py

app.py

@@ -384,6 +384,10 @@ with tab3:
 
             # Global wells list long enough to cover allocation
             global_wells = build_global_wells_list(plates_needed)  # [(p, 'A1'), ...]
+            global_wells = sorted(
+                build_global_wells_list(plates_needed),
+                key=lambda x: (x[0], ROWS_96.index(x[1][0]), int(x[1][1:]))
+            )
             global_wells = global_wells[:total_wells_needed_uniform]  # exact length
 
             # Assign blocks of size max_wells_per_source per input in order
@@ -460,7 +464,7 @@ with tab3:
                         source_volume_totals[(src_plate, src_well)] = source_volume_totals.get((src_plate, src_well), 0.0) + vol_per_one
 
                         commands.append({
-                            "SourceIdx": pos_idx,
+                            "Input #": pos_idx,
                             "Source plate": src_plate,
                             "Source well": src_well,
                             "Destination plate": dest_plate,
@@ -473,7 +477,7 @@ with tab3:
                 commands_df = pd.DataFrame(commands).sort_values(
                     by=["Source plate", "Source well", "Destination plate", "Destination well"], kind="stable"
                 )
-                commands_df = commands_df[["SourceIdx", "Source plate", "Source well",
+                commands_df = commands_df[["Input #", "Source plate", "Source well",
                                            "Destination plate", "Destination well", "Volume", "Tool"]]
 
                 # Source summary (include allocated capacity per well)