i just got imoen back from irinecus, anyway she gains experience in her mage class but not as a thief it just stays at shity lev 7. Is there anyway i can make her gain experience as a thief too? is it a bug?

She is Dual class. Read about it in the manual. She is much better off as a mage, multi-class chars will never be able to use high level spells unless you remove the XP cap.

she started off as a thief, got to level 7 and then switched to being a mage. that's what dual class is. so no, her thief skills will stay at a shitty level 7. she's not so bad anyway! she just can't hide in shadows. better than nalia i think.