This is usually not an issue for me since I have no hope of being upgraded on transcon flights on my typical U and O fares...but since I am on an H fare next week it makes this an interesting question.

When doing OLCI for my outbound flights, I have been checking the auto check-in box for the return flight. However, it has been my experience that if I still go in myself at exactly 24 hours for OLCI and do it myself instead of just letting the auto checkin run, I get a lower sequence #.

Any thoughts or experiences are appreciated.