Negative credits...?

My current credit amount is -19.50...? How is that even possible? I checked to see if any of my posts were deleted, but they weren't, as far as I can see. The only forum that I'm subscribed to where my credit count is negative is Web Discussions. Can someone please restore my credit amount to what they should be? (based on how many posts I have at Web Discussion - I was already a member there and had make like 5 or so posts, so subtract that from the total amount)

 

I read that topic.

I read that topic. Before, I had around 55-60 credits. Not sure about the exact amount, but it was in that range.