Hello,
If you just recently had an increase in your feedback (did it happen today?), it might be because Auctiva hasn't synched your account info with ebay yet. I think they do that once a day, but am not positive.
Did you recently change or modify your email addresses with ebay and/or PayPal? Could be the same type of reason, that ebay and PayPal haven't synched with each other yet.
If you don't think these reasons apply in your case, I would recommend that you file a support request ticket with Auctiva so they can help you further.