Invisible shop keepers for some reason

For some reason 4 of the 5 shop keepers I've got in my small town are invisible in game... I have no idea why. Well maybe not totally, I have the high res mod on and I have vague memories of characters in other posts being invisible for that reason, but I'm not 100% sure that's the case for mine.

What might be causing this?

Edit:

It seems all the objects and people I've put items in are invisible... I have no idea why

Edit:

Pfff woops, forgot to compress my module.