My post count jumped by 400 the other day. I looked through my previous posts to see if anything stood out but didn't see anything. It was back to normal the next day though.
I think this is why that happened:
- "MOVED: " topics don't normally increase your post count. (I think.)
- I recounted all post counts recently, and this included "MOVED: " topics.
- Later, I deleted all "MOVED: " topics and recounted again.