Yes, there are indeed sublevels but do realize that 1v1 trains JS and IS at a very slow pace only. Check the training simulator (you can find it in the BB Help programs thread) to find the training speed of each skill per training in the Coefficients tab.
Seeing the height of your players I'd make them PF's with good secondary skills. Your 6'10" PAS will train slowly in things like OD which is low, so to make him a good SF combo would take long. Depending on your trainer and ability to train, you can take into account how much time you can spend on secondaries without failing to reach their potential. Nice trainees.