I'm one of those writers that often makes use of the "edit" button, but sometimes I forget to edit something and have to go back in to fix it two or three times before it's correct. I noticed earlier that when I went to edit a post for the second time, when I saved my first edit had been replaced with what had been there previously. Is this a bug or just something that I have to refresh the page to do multiple times? 

Update: Even if I leave the page and come back, all edits are reverted back to the original post. So if I need to fix something, everything needs to be fixed again at the same time.