Originally Posted by
restlessinRNO
cagcag - I note you are UA 1K MM. You are probably aware that on a booked UA award ticket, if you made a connection that is over 24 hours, then you are requesting a "stop-over". You are allowed a stop-over of this type on a UA award ticket, if it is a round-trip, using the "excursionist perk", described in the UA forum. Good luck.
that's probably why OP tries to change it "inofficially" or "ad hoc"