Slynky, I'll have more details when the time comes, but it's a little different than what you remember. You move up by beating those above you, but you don't switch with them, you move up half the distance between you and them. So playing two games beating the player farther above you would have more of an impact on your position, but both would affect it. And what maters is the positions at the time the match ends, not begins. The only time you switch places with someone is if you beat the person exactly one rung above you.
You move down the ladder by losing to the player immedietly below you. Losing to someone farther down doesn't affect your placement. You also move down by being passed by people below you beating those ahead of you. You also move down if you don't play a certain number of games. You can't be a ladder hog.
Multiple player games are done by each person reporting a loss to each person still in the game at the time they are eliminated from the game. Losses to multiple players are reported in order starting with the highest ranked player on the ladder, irrespective of position in the game at the time.
Team games can be done by each member of the losing team reporting a loss to each member of the winning team.
Geoschmo