We finally got the Midwest-Aviation problem resolved. Just an FYI for everyone else.
I was running an fshost session behind my firewall on another computer, and had the ports forwarded to my server. Whenever I was to join the Midwest-Aviation server, things would go haywire, and everyone else would get booted. I un-forwarded the ports on my router and all systems are go now......
This should have been obvious to me, however, as with many things, the obvious can be easily overlooked!
Hope this helps someone else in their problems, what a great product
btw- the postcard is in the mail!