Bug like? Please. It has been like this since we introduced surround mixing - version 2 or 3.
It has worked and produced many a surround project for many users. It is very capable if you use it the way it was intended to be used. I understand what is desired, and I am not against what is being asked for. What I don't understand is why now, after nearly a decade this has been turned into such a big issue.
That said, I assure everyone that it will be discussed for a possible future release. At the same time, there are many user requests that we have to consider, so there is no promise that this one will appear.
Got my fingers crossed for a future release (vegas 11?).
The main reason I'm asking now is that I'm finally getting much more demand for surround mixes. Before, it was few and far between, and the limitations weren't so bothersome because I didn't have to deal with them that often...