I tend to blame unposting messages on my entering my message on a browser that's saved on my computer. If I refresh the browser by hitting F5 on my keyboard or clicking that circular arrow icon, the browser seems to take the message the second time.
I try to remember to Highlight [CTRL-A] and Copy [CTRL-C] my messages, so I can Paste [CTRL-V] them into a refreshed browser if I need to, and I always check to see if my messages posted.

Sometimes, a bad Internet connection or a nasty phase of my antivirus software seems to be the problem, or a bad browser update. Right now, I can't edit in descriptions of my Facebook pictures, and I wonder what that's about. Or if I get them to "take," they don't appear on Facebook - but I can write replies to posts.

It can be fwustwating.

-Joe-