It sounds like a cache problem to me also. Or the settings in your browser (Firefox / Internet Explorer / Chrome, etc).
Easy thing to try is to download the free C Cleaner program (cleans drive C and also crap) which will clean out (erase) all your cookies, cache, downloaded nasty bits, etc. Good for when you want to have a fresh start (like every day when having problems).
C-Cleaner is from Puriform here:
http://www.piriform.com/CCLEANERYou could also , as a try, wipe (erase) your cache (history) in your browser settings. Go to Tools (drop down menu) / Options, then look at the privacy and also Advanced tabs to clear Cookies and Cache. That is in Firefox by the way. Should be somewhat similar in other browser programs too.
Sometimes, what happens is that everything is remembered (especially if you get your computer to remember passwords etc etc, so it keeps using the old saved stuff you typed in before instead of the new stuff.
Try to keep it all simple as you can.
I type in Word my listing (in HTML (old style)) and then just copy and paste it in List Your Item form on
ebay 's listing page. A bit slow but I feel I have more control, which I like.
There are lots of ways to do it, but the main thing is to clear out your cache (remembered history) every once in a while. Happens on all computers.