I love it when I get direct posts on the forums.
🙂
Is that a wireframe view? I'm not positive what you're seeing there. I'll wager a guess that you're seeing the hole that was cut into the Main Duct when you initially placed the takeoff. I think you then probably flipped the direction of the duct later, and the hole didn't move with it.
I believe that's a known issue, but shouldn't show up in Hidden Line views. It's tough to know without an example. I'd recommend that you report this issue to your reseller support team or our Subscription Support team.
Cheers,
Kyle B
Revit MEP Product Manager
http://inside-the-system.typepad.com/
Kyle Bernhardt
Director
Building Design Strategy
Autodesk, Inc.