i think your structure about players and their winning picks on a specific day is very confusing.
for example i see some players on winning pick on day 1 and winning on day 2, too. they should be only on the day, which was their last winning pick. also, it's very useful for the players all their picks to come after their name. in this way they can track their picks throughout the tournament.
one suggestion: you can track the players' picks on a separate post or place, and when a specific player lost, you can place him/her on the day with last winning pick.