Not sure if there is a more targeted forum, but feel free to move.

Every time I cross the border back into the U.S. my passport alerts, causing me to receive extra questions, usually after being redirected into a back room.

Every time I've asked why, or if there was anything I can do differently, the agents have shrugged or said they had no idea.

Last week, preparing to board a flight in Vancouver B.C., after seeing the alert, the U.S. border agent asked a co-worker "is Mike November still a mandatory referral?" He wouldn't tell me what that meant, and I was again referred for extra questioning (including questions about my "tats" - I don't have any ink).

Any idea what this is and/or anthing I can do to avoid it?

Thanks.