I dont have any video, but there were 4 other players at the boss, not sure if it was 2 squads or 1 large squad.
We are sure it was just your team that suffered from this bug and you encountered a number of other duos at the boss. There are no sessions known to us where this bug resulted in more than one 3+ sized team. It's a fairly rare bug to happen as a consequence of the matchmaking system running into problems during team ID assignments. Will be fixed eventually.
On a different note, looking at the picture above: Force ghosts confirmed! :P