Michael Black wrote:
Yes, I was surprised your post appeared. My experience is that if they
reject it, the post is lost despite the cross-posting. So the reply just
disappears, unless it is approved. It's an odd situation, since they keep
telling us that cross-posting is allowed to the moderated newsgroup,
though nobody asked us, but if we gripe in response to their cross-posts,
chances are good the post disappears.

That is because it works as I described: when you crosspost to multiple
groups with a moderated group amongst them, then entire post is sent to
the moderator who approves it and posts it in all the groups.

So when the moderator rejects the post for his moderated group, it will
also not appear in the crossposting groups over which the moderator has no
authority.

(unless he would chose to approve it and edit the moderated group out
of the Newsgroups list at that time)