You do not have to lift twice. In Power Sports , the Full Meet, consists of the Curl, Bench Press and DL for the Total. Power Sports also has a Single Lift Contest for each event. If you enter the PS Full meet and choose to enter the Single Lift Curl, BP or DL, your lift in the full meet counts as that lift in the single lift event. You don't have to lift again for the single lift event.
All lifts carry over.
The Squat is the Only lift in Power Sports that is a True Single Lift Event. These Divisions are held for those that want to lift without any type of equipment except a lifting belt. There are a couple of answers to this question. First and foremost is simply, the lifters refuse to pre-enter. They simply will not send in their entries before deadline time.