On my rear left door my plastic or I think I've heard it called cladding, is pulling off in a couple of spots. How do I fix this? Should I just pull the whole thing off or just fix the two little bumps that are coming up? I would think I should pull the whole thing off, cause their might be dirt or something behind it. How do I re-attack it?

Double-sided adhesive tape is the common fix for that. You can grab it at any/most auto parts stores. I would probably pull it off and redo it depending on how much is coming off. If it'* a really small area I'd probably try to fix those areas themselves.