Yes, it probably is. Somebody else has reported a bug too. I admit that it was a quite a while ago, and I've been lazy in fixing it. I've suffered a lack of will to program anything pokemon-related for the last year or so, and for that I apologize. I'll try to work up the courage to correct the error and make a new version soon.
Can you provide the exact steps that you do to cause/replicate the bug? Is it only the contest appeal that gets messed up? Such things would help me out a bunch. Have any other suggestions/problems?