Earlier in the season Randy get's his hair cut, but in this episode his hair is long again like Brad and Mark's. Also, Brad and Randy look older in earlier episodes. It's possible that the scenes at Al's apartment were shot at the beginning of the season or end of the last season shoot schedule.
In the scene where Tim drives through the golf course, there appears to be two people in the tank that Tim is supposed to be driving.
When the tank runs over the golf carts, Tim is clearly not visible in the tank drivers seat where he supposedly was.