sims getting lost?

[Spicey]

what causes sims to keep showing up on a lot over and over and over after the lot sim has told them to go home, or they've said they needed to leave and then left?
it's like they go around and around the block or something.  sometimes they say they need to leave again, and sometimes they just keep wandering around.  they never do anything if the lot sim doesn't greet them.  i usually end up getting annoyed at them (the wanderers) and snatch them out of the game.  which is great for my sense of omnipotency, but can't be all that great for the game itself.

[Emma]

It sounds like a portal problem. What eps do you have?

[Alexx]

Why you don't use teleporter to clear off visitor from lot?
Also maybe you must check you lot with lot debugger.

[Spicey]

i've got everything but hm.  the problem seemed to start after i installed seasons. 
come to think of it i haven't seen it since i installed the last patch, but i've also pulled out all my hacks and only put the ones back in that i knew for sure wouldn't conflict.  the lot debugging sounds like a good idea in any case.

here we go again...