Mailman - subscription problem

[Joe]

My recent posts are coming back with Sender: nflug-bounces at nflug.org

I tried to resubscribe to the list and got an email back saying:

An attempt was made to subscribe your address to the mailing list
nflug at nflug.org.  You are already subscribed to this mailing list.

What's going on?  Are any of my posts getting to the list?  There have been several in the past few days.  I see at least one or two that have replies from other list members (all sent using this email address.)

I CC'd Darin, because, last I recall, he did list management.

Joe