Daryl Smith wrote on Jun 29^th, 2012 at 10:36pm:

Hey guys!!  No comment on the COM freqs, or the location of a bug list? Sometimes I get no respect!  :-/

Are you kidding me?  :o

Namco just gave a link to a thread that has been started to report these issues.

BTW: in FSX the only time you could use 2 com frequencies at the same time MIGHT BE when using VATSIM or another online/multiplayer scenario. Even then I doubt it.