Originally Posted by
dkc192
The past guidance/policy that has been given to me by multiple agents in the past was that if I had a significant schedule change (> 30 minutes or nonstop going to connection, as defined by UA), I could rebook within the +/- 7 day window and preserve the upgrade. Basically rebooking within +/- 7 days without add-collect is considered an invol rebook, which also comes with upgrade preservation. ....
+-7 day is a rule but the preservind upgrade is a courtesy / practice, not a published rule. As you have stated in that past, sometimes it took multiple tries to get this. UA may be tighten up on this, but with knowing how much you were trying to stretch this, it ii hard to understand what was happening.
(OP has now added it was 6 days) But moving more than a adjacent day on a route with multiple daily options is beginning to feel like taking advantage of the schedule change rules. If this was becoming common, it is not surprising UA felt the practice was being abused.