Hm... that's incredibly odd. If you hit the 'save page' button at the bottom of the page after making changes, it *should* push your changes through.. I don't see any 'bad' edits in the history either.
Make sure you're not hitting the 'Preview' button by accident. All that does is show you what the changes you did will look like when you hit save. It doesn't actually save anything until you hit 'save page'!