I have a level 4 trainer as well. I think it has to do with the new cross training pops with season 17. Usually I only get one pop per player too. One on One is different then other skills, as it trains handling, driving and I think inside shot and jump shot in slower increments. When I first started this game, near the end of Season 15 and a little bit last seasoon, I bought a few of 18 yo's off TR thinking I'd be able to train them all at once. Turns out I was wrong, but if I keep getting multi-pop weeks, it'll make it easier to except my stupid moves.