No, there is no fix for it because it's not a bug. I personally wouldn't like to see my post count go down, because an admin decided to delete a bunch topics on the forum. After I worked so hard for my stars.
But there was a modification done to do that. I will look around and see if I can find it.
My forum is new and therefore I find it strange to have 'admin' with more posts than the total posts for the forum. This is because of all the test posts that were deleted.
Thank you for finding this for me, I couldn't seem to !