This has never been a problem until now.. I resurrected her on the 20th and she has been in 54 contests so far, hasn't leveled once! Other ponies I have ressed are leveling fine, do I just keep contesting? She used to be great.
She still has negative EXP after being ressed.
You have to get her out of negative XP, so yes, just keep putting her in contests, make sure they are full.