Hi. A few questions to clarify what's happening...
Are you copying all the shipping, etc info into the description box or using your profiles? If your using profiles, you can't see it by viewing your edit page. Click preview and it'll be there.
Are you loading the pictures directly into the description box or using the boxes underneath? I can't imagine why they would disappear. They should show up when you go back into it, either way.
Please let us know and maybe someone else will be along that has an explanation. If all else fails, there is always Support. They're great to help and have a fast response time.