"251 post revisions in your database". I tick the box for "Remove all Post revisions", and click Process.
The page reloads and it still says "251 post revisions in your database".
At the very bottom of the page it says "post revisions deleted". Why does it still say there are 251 post revisions up the top?
This occurs for all functions, including spam comments, and auto-drafts. There is no caching installed in WordPress, and I have cleared my browser cache, and 251 post revisions are still there.