Strange Forum behavior or is it something I'm doing?

I'm just posting this  to see if anyone is seeing this behavior.

I've got a topic running below in the forum.  There were 2 new comments that I responded to, and when I went back to read through the comments, both the comments and my responses were gone.  Is it something that I'm doing wrong?  I have gotten some kind of warning message along the way, but there's also a message saying that my comment was posted, so I'm not sure what to do.  

Just wondering if it's just me, or if something else is going on.j

Thanks.

Ron