The Tournament Staff is purchasing the rights of symphonyx64 from the Circus Maximus Tigers for his auction value (4k) and granting them a player of their choice from the remaining pool of players. The choice will be made no later than Friday, December 28, 2012 at 11:59 PM EST. The cost of the choice will be the same value of symphony's auction price (4k).
The reason symphonyx64 is being taken off the team is because he will be the new co-host of SPL. There is no precedent created for changing players following the auction unless in the case of the player becoming a host of the tournament. Otherwise, the only method for being rewarded credit is at midseason for an inactive player.