I'll jump in here, no specific ideas, but a few things to try.
This calls for a divide & conquer approach, narrow the root cause down to one specific thing, an OBi configuration, or your phone handset(s).
-Do the handset(s) behave correctly, i.e., not show "N/A" when connected to a phone line other than the port on your Obi202?
-What do you see if you call your CallCentric number directly (bypassing GV)? The main possibility here is a call to your GV # is ringing both your GV # and your CC number and the OBi receives one before the other.
-What happens if you place a call to your GV # after you've changed your GV Settings and disable the the forwarding to the CC #? Hint/Tip: Nothing should ring on the Obi.
-Last thing, and this one is a long shot: Caller ID and Name delivery to an analog phone is defined to occur between the first and second ring. OBi devices go a little further and allow this to be configurable, see Physical Interfaces > Port Settings > CallerIDTrigger. This is not always as it seems, even though it may be set to After First Ring (the default), that assumes you have a 2.0 second ring with a 4.0 second pause. If you change the ring patters at all form the defaults, you can have any number of rings you want, but the ringing signaling must stop at 2.0 seconds (if set to After First Ring) to allow the electrician signals for Caller ID and Name to be delivered to the phone (before the next ring). If you even suspect this at all, revert to the defaults (on OBI and your phone handset) and see what happens.
We'll all be curious, report back whan you find.