what is a sub-level??
What you see on your players is not the complete story behind their skill levels. For example, you might see that a guy is respectable in jump shot but all that means is his skill is somewhere between 7 and 8.
So the player in my fictitious example could be low respectable or high respectable. The sub-level, as I have called it here, is the decimal level of the skill that you don't see.
Run of the Mill Canadian Manager