I don't understand that as well. I thought the rank order was:
1. number of wins, if tied
2. smaller number of total battles (i.e. less losses), if tied
3. whoever came first
maybe 2 and 3 are switched ? Seems like sorting in gauntlet is a complete mess: rankings don't seem to be ordered properly. Toons for selection can't be sorted properly. Trooper rankings in the rankings tab are not sorted properly. oO