For future rounds simply insert the number of the round, which is just after the player ID. To put more than one player for that round, simply change the "priority" to 1/2/3/4 etc, depending on the number of guys you're proxying for that particular round.
Tip: I rarely if ever use the "group" feature as it kinda complicates things a bit, for myself anyway.
If you're still unclear just ask away,,it's not that easy until you've used it a few times.