Berkley,
This may be a stupid question, but did you make sure that you set the Service Type on each trunk is set to Bellcore FSK Caller ID and while you are in there verify that you also have Connected to CO set to yes or your Hybrid Balance tests will be inaccurate.
The only reason I am looking at this first is because the CO Trunk Group has nothing to do with collecting digits of any kind; that is only done through the trunks.
Thanks,
TE