That's correct, but I didn't include any of the NT field models with this Catalog. If it were the case, placing the Field Models - Main Characters above Gameplay - Difficulty and Story would fix it, which is already suggested for the load order in the written tutorial.
There should be some battle models parted together from original game assets to form new enemies. They use new file names from the original, so none should interact with the Battle Models - Enemies category no matter the load order.