Well, I actually went to an enrollment center yesterday. Here is the full story. I was an Indian citizen and Canadian Permanent Resident, when I got my Nexus card. Later on, I became a Canadian citizen. I wanted to update the passport number in my Nexus profile.
I used the ttp.cbp.gov website and created a "change my profile" for whatever its called. It created a case entry in the status 'conditionally approved'.
I called CBP and was asked to drop in without appointment, to get these changes made in my Nexus profile. The problem is that since I initiated that process online, and the conditional approval confused the guys at the enrollment center.
The enrolllment center said everything is good and I'm good to leave. But I still have the same old Nexus card which shows info about my indian citizenship..