A win over Boise, who would be close to or in the top 10 by the time of the game, holds more weight than you think. It's also a far more impressive win, especially on thoad and for a conference title, than beating unranked Memphis and Army, who despite their 9 and 10 wins weren't even ranked. The committee realizes the AAC is weak this season, and in this scenario, UNLV would've had a better win against a ranked team, as well as 2 wins against power 4 conference teams (albeit Houston and Kansas, plus Oregon St. in a down year), while Tulane lost to both Oklahoma and K-State. UNLV would also have had the better loss. The fact that it's 17 vs 22 isn't as wide of a separation when debating teams, and so, while Tulane may have held on to the spot, there would have been a very realistic chance that UNLV ended as the 12 seed if both them and Tulane ended 11-2 and conference champs.