It seems that every skill I have goes up at a normal rate if not really fast. My one-handed goes up at a pretty good pace. My sneak was 100 by level 30, and archery is in the 80's now and i'm level 36. Everything is going well but only one thing is lacking; destruction. I use destruction spells and destruction spells only when I fight dragons, and those fights last about 30 minutes or more. I use fire runes, firebolts, lighting bolts, icespikes, etc. The skill goes up 1 level every 6 hours or so in real life time. As much as I use it, I would expect it to go up higher. Is this a glitch or am I doing something wrong?
Btw, I'm playing on legendary mode.