Circles5,
Another way that will absolutely help you not to loose your posts, even if you tick "remember me" when logging in, is to write your posts in notepad or Microsoft Word or some program like that.
After you are done writing it, you can copy and paste it into the posting window on PC and click Submit Reply. If it goes away, you still have the post on your computer and you can log back in if that's what is needed.
Nothing is more frustrating than loosing a post that you worked hard to write. I so get that!