The CHAMP 70 is not the "wrong" loader for the A320, it has been added precisely because, when we made the CCL the ONLY loader for A320, lots of people complained it was too modern, not common, not used at their airports, never seen in real life, etc.
So we listed to complains, added the CHAMP 70 and allowed to service the A320, which it CAN do so no, it's not "wrong" either, even if the CCL could fit even A319s.
Since the only issue is with the A319, just set the front Cargo door of the A319 to use BELT loaders.