Carpe Diem:

"For games with a random start position generate" just means same start position for all games of the tourn (froglet, pah tum ... have random start position for example), its not about players colors at all.

But if you are very high ranked in a game, elimination tourns ranked by bkr (optional) will put you always at the top of the tourn grid, so you will start all games (example : five in a line, you will have black in all games)..

The problem is this option ('ranked by bkr' ).