Default balancer for Duel rating type (respect_avoids in this case) seems to always put the lower rated player in team 0 (shown as team 1 in Chobby) and the higher rated one in team 1 (shown as team 2 in Chobby).
This is an issue because map starting positions depend on team order.
The fix should always randomise team order after the balance algorithm is ran, this should probably be done in Teiserver.Game.BalancerServer so that it''s independent on the result of a specific balance algorithm.
User respect_avoids balance algorithm (I suspect split_noobs might have the same issue) to balance 2 players of different ratings. Lower rated player should always be on first team.