[meaubry]

Do the rules indicate if the scored trak ball (either under or over) cannot be scored again, prior to going around again?

I don't recall reading that - and the way the balls bounce around, it might be difficult to remember if a ball had bounced clockwise - (opposite direction, backwards into the neighboring quadrant) -after it had previously scored.

If it is okay to pick up and score a trak ball that has bounced backwards - It would increase the opportunity for higher scores.

I guess I'd better start re-reading those parts of the rules one more time.