Not 100% sure what you are seeing, but if it's something new that hasn't been happening before, it might be worth a full log out of the site and then log back on and try again.
Sometimes the system gets the hiccups, but resolves itself after a little while.
Also, if you are seeing the problem on only 1 page and not all of them, then your page is broke and the only thing to do is delete the whole page and re-create it.
Good luck!