thread and post count has gone crazy

[JIK1987]

Earlier today the board was fine, but about twenty minutes ago I went onto the board and the post count was crazy. It's showing that threads and posts have not been viewed by me since June of 2010. Posts that have been moved to other locations are back to their original spot (which is very bad because some of those threads have been moved to admin only forums). If someone tries to post, it becomes the first post of the thread they are posting in and I haven't even begun to move threads because I'm worried it won't work in the first place. It also is listing all are members who have ever visited at once!