Mirrored Soul increases Skill Defense by +54 per level.
The skill defense increase you have for that level isn't bugged, it's correct.
Holy cow...just curious, any reason you jacked your mages up that high at the expense of your other skills, other than you just want them to hit hard?
I knew someone is going to ask that. lol. well nothing much, I got bored with Adamanti and Smoulder. EVERYONE has the same line up. though I'd try something new. Its VERY HARD actually. I had the Hardest time when I'm facing Bloodstorm, most of the time, I could survive Adamanti's Skill attack though. But Bloodstorm in PVP feels impossible if you don't use Cianna or Rhizine, his damage is just, GWADLY. Thats why I wanna try something new though. But all in all it keeps me going.