menus: fix duplicate entries

Credit to @Ray-Hsueh for finding the initial fix

Author: laggron42

ballsdex/packages/balls/cog.py

@@ -175,6 +175,7 @@ async def list(
             query = sort_balls(sort, query)
         else:
             query = query.order_by("-favorite")
+        query = query.order_by("-id")  # enforce a unique ordering to prevent mismatch during pagination
 
         if not await query.aexists():
             ball_txt = countryball.country if countryball else ""

ballsdex/packages/trade/cog.py

@@ -345,6 +345,7 @@ async def bulk_add(
             query = sort_balls(sort, query)
         if filter:
             query = filter_balls(filter, query, interaction.guild_id)
+        query = query.order_by("-id")  # enforce a unique ordering to prevent mismatch during pagination
         if not await query.aexists():
             await interaction.followup.send(f"No {settings.plural_collectible_name} found.", ephemeral=True)
             return