Originally Posted by
CIT85
On a trip last September, I had to split my wife (no status) from my PNR at check in for outbound for CPU purpose. She was ahead of me on upgrade list for both outbound and return. In fact, my wife cleared upgrade on return flight while I was #1 when the flight took off. Go figure.
It's been a while, but my recollection from splitting is that if you initiate the split you tend to get the new PNR, meaning the companion keeps the first-in-time priority based on original booking date.