Yup-NAPS are pretty messed up. I think you have to get rid of all the existing NAPS before disabling - otherwise they still seem to be enacted.
I just had something odd happen too - not sure if related to NAPS or not. Moira Fryes just won the lottery- I am playing a thief so I switched to their house to put in a vault and put the $1,000,000 in it so my thief could try to break in later and steal it. I had her and her husband woohoo in the money before I was going to go back to my thief - while they were doing so - the vault and all the money in it completely disappeared - you could see the two sims crouched down still doing the deed but the vault was gone! I thought it was a momentary glitch and would be fine after they were done but it is just gone! I would think it was that Caring is Sharing NAP but no one else was at the house and it disappeared while they were in it! I even checked their household inventory - not there either.