Sims 2 bugged

In regards to the first one, it's possible the game thinks there's some scenario that is still supposed to be happening because it didn't delete the controller for it once the action was complete. Someone came home from work, a visitor came through and walked on the driveway, someone moved in or out, a Sim played kicky bag on the sidewalk connected to it, or various other things. I suggest getting the ffs lot debugger and trying some of it's options. It exists because the game does weird stuff like this.

Nuke: Scenario Controller and controllers for other things that shouldn't be there, for instance it may tell you that there's a stuck move in/out or offworld loiterer. (An offworld loiterer is a Sim that was on your lot and should have left when they walked off the other side, but for some reason they are still there, just invisible). Sim schedulers if that is there. (If a school bus or work car needs to come after you do this, reload the lot so it can schedule them again). 

Fix: Work State. Work state has more to do with work penalties for being late and that sort of thing, but if the game thinks your Sim should be at work or returning from work, it may help. Invisible Sims. This is similar to offworld loiterers in that they are invisible, but it can happen to Sims entering the lot and Sims who live on it, not just leaving it.

Force Errors: First, make sure testing cheats are off for this one! On in-world. This will force an error on all objects visible on the lot. On off-world. This is for objects that should be off your lot, but the game may think they are on your lot. On all. That's everything, visible or otherwise. It's important to make sure testing cheats is off when you do this, which brings me to my suggestion for the second one.

The game throws errors all the time on objects and Sims. I don't know why, but it does. If you ever take a gander at the logs, you'll see hundreds of them. If you have testing cheats enabled, the errors will pop up and you will have to choose what to do. With testing cheats off, the game handles the errors by itself, choosing reset. It's usually instantaneous and you should only occasionally notice. So it's best to turn the cheats off as soon as you are done using them for whatever you needed them for. All that said, do you still get this pop up even with cheats off? Are you constantly seeing Sims reset and stop what they are doing? If so, then it is a bug and not just the normal stuff.