Possible glitch in online upgrades

My wife, daughter and I have a booking to LAX next month in Y (all on one PNR). When I booked, it had all the info on my wife and daughter already in the system, as they are both on my gifting register.

When I went to upgrade, though (and I tried using both RUs and standbys), only my daughter and I were able to be upgraded. A statement said "Not all passengers on this booking can be upgraded as some are not on the gifting register". My wife is my GE partner, for goodness sake, and she was clearly on the register when booking.

Is it a possible glitch that it doesn't include GE Partners on the upgrade list? Anyone else experienced this?