Can't help you then dude. The game does funny things sometimes, my Bard hit level 24 and on level up it said lore (minus)- 230 leaving a high level Bard with a lore of 10 or so. Never did figure it out and couldn't find a way to sort it with S.K either. Anyhow, I dunno if it could be sex change related, I wouldn't have thought so. You didn't mess with his/her XP in S.K did you? Although, again, I'm not sure that should matter. Why not load a game pre the S.K changes you made, award him sufficient XP to lvl up but touch nothing else and see if he/she levels ok this time. At least it will tell you if your previous S.K changes may have affected something.
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It's bleedin dark down here, slippery too.
Man, that's a pisser.