menu bugginess

I believe I found a bug. It's happened three times so I'm pretty sure it's not operator error. I'm making a new header menu. On it I have 6 main categories with sub-categories then multiple posts under each of them. Face Body Skin Products Fitness Musings This is different than the one I cureently have and am making a new one but three times, after saving the menu, I lose some at the end. For example,this last time, I saved the completed menu and not the Fitness and Musings section is gone! Is there a limit to how many posts I can have on there? I've created it under the header menu because the main navigation menu is already up as the primary menu and I wanted to do it in increments before putting it up on the site. The same thing was happening on the staging site and I thought if was a staging error but now I'm on the front end of the site and it's doing it as well. Just tried it a fourth time - re added the musings and fitness section but it is only letting me keep 5 categories in the main nav. Help! Kim hidemyage.com