I have several characters in which I've noticed this... One of them I maxed out ALL skills naturally and only 2 skills had empty bars while the others were full, another character I maxed out ALL skills with the Oghma Infinium glitch with all of the bars empty, and now I'm working on another character with the glitch, but some of them are full while others are empty and I'm trying to avoid it - either by making ALL the skills empty or full, but no matter what I do differently to try to make them all the same, one or two of them comes out messed up. Does anyone knows what causes this to happen with a skill?