Charlatan,
Apologies for the slow response on this.
I logged this as TT # 1875.
I think that what you're saying is that even though you may be re-discussing a trade with the Red Sox, you could still change the team to the Yankees, which would really confuse things. I think the idea is that if you're "rediscussing a trade" with a certain trading partner, those drop-downs should be grayed out so that you're stuck talking just to the Red Sox.
Is that what you meant?
Steve