Your question about some postings getting through and others aren't is the million question. We don't know why some posts are getting through and others aren't. They are looking into the issue and will let us know when they discover the problem and have fixed it.
As for the warning...that's a new one today. As Cadet asked you...what browser are you using?
All we can do is ask that posters please continue to be patient. Cadet and I have contacted Virginia several times in the last week about the disappearing postings. We have been assured that they are working on the problem.