One item multiple textures... not working?

Alright, so I'm trying to do something fairly simple... I made a flowerpot model in blockbench with several different textures. Goal is to make several different flowerpots using the same model just change out the textures.

Pretty simple I would think!

But for some reason, whenever I try to add the .json file into MCreator the mapping is only reading one texture not all the others. I did this before with an animated model where it's the same model but different colors, so I can't understand why it's not letting me do it for an item!

I deleted and redid this several times, so it doesn't seem to be a blockbench issue, but just for some reason, MCreator is refusing to change the model mappings.

Any clue of what's going on?