Confused.

I recently posted several messages to this NG but because they didn't
show up when I downloaded new headers, I naturally assumed that were
not accepted. Now I am told by other people that my messages were
definitely published and have attracted some replies.

Apparently I can only get a proportion of the available headers. Are
others on sci.astro.research published via a different group server?
If so, how can I access the other messages? I would like to continue
the argument I raised.

I have never had this problem before.