Xbox & PS4 Rank promotion bug.
this may apply to your PS4 fleet too )
Ive been having trouble promoting alts in the XB1 fleet.
When trying to promote them it promotes the persons other character instead of the toon that im trying to promote. This has happened both from the roster screen and from trying to promote in person.
Ive looked it up and it appears to be a bug that hasnt been fixed in a while.
There is work around.. a fleet captain has to invite you to a team, then promote them from the "Manage Team" menu
Premote the alt when he/she is online on that characterhttps://www.reddit.com/r/sto/comments/5zr9xa/xbox_promoting_alts_in_fleet/
its a pain in the bum