I was wondering about that sowness on the site myself. I even had one comment that was never posted as best I can tell.
Here is my trick.
First get a Desktop Computer. Attempt to post something and then open another Tab on you browser with FreeRepublic and click Pings to see if your post is there. If it us not there repost it. If it is there don't post it a second time, a third or even a seventh time.