Amb,
YOu need to go to the first trunk group that was created and disable the channel(s) that you want to move to the 2nd, using the command dis 1 x (where x is the channel number to disable). Then go to the new Tg and enable the channels by typeing ena 1 x (where x is the channel number).
If you need further assistance, you may email me direct at mike_voip@hotmail.com