You are thinking logically and this game has nothing to do with logic. SB training trains Rebounding, WHY? Why does training handling give you OD partial training? Nothing makes sense.
That is how training works. Doesn't matter about sub-levels. If it goes up a whole level, his salary will change.
That is how training works. Doesn't matter about sub-levels. If it goes up a whole level, his salary will change. News to me... i'm quite sure sublevels count for each - performance and salary