I don't know if I am alone on this - but sometimes I find after I have logged in and have either commented on a post and am replying to another post - my post disappears and I have to log on again - even though I have already logged on. Is this something new? Do we have to log to every topic of discussion? I thought once we log on that's that. If I don't save what I have typed my comment disappears and I can't recover it. It's really frustrating.