Fun is the best teacher.

I had less 1v1 elo..

It's not about prize, I'm jsut curious why.

Perhaps it takes level into account instead?

Indeed. Note that inserting the following code in line 241 is not enough:

if (Duration >= GlobalConst.MinDurationForXP)
{
    WinnerTeamXpChange = (int)(20 + (300 + 600 * (1 - eWin)) / (3.0 + winners.Count));
    LoserTeamXpChange = (int)(20 + (200 + 400 * (1 - eLose)) / (2.0 + losers.Count));
}
else
{
    WinnerTeamXpChange = 0;
    LoserTeamXpChange = 0;
} 

It would still use team elo for 1v1s on silly maps or with noelo. Additionally the code from line 162 to 177 has to be put to line 183 and a noelo/silly maps exception has to be added to Calculate1v1Elo().

Skasi I think eWin and eLose are locally overwritten in Calculate1v1Elo(), so that's no problem. "Elo" is an account's team elo and "Elo1v1" is 1v1 elo as you can find in Account.cs.

EffectiveElo = Elo + (EloWeightMax - EloWeight) * EloWeightMalusFactor