In a scramble you sign-up as an individual player and play as a partner with different people from your pool each game. Stats are calculated for each individual player.
After pool play the top X number of players will move to a single elimination medal round.
For the playoffs you'll be matched with the player from the other pool who has the same pool ranking as you.
For example:
if you're ranked 3rd in pool 1 after round robin play you'll be partnered with the 3rd ranked player from pool 2. You will then stay with that partner throughout the medal round.