The reason for the second trial is that the jury had awarded Apple one damage amount per device even though some models were said by the jury to have infringed on more than one patent. The ruling left Apple's award at $598.9 million, plus whatever the new jury rules on the second damages trial, and pre-trial interest. But Apple is claiming that Judge Koh's calculation leaves it more than $85 million short.
Apple has filed with the court, seeking reinstatement of $85.3 million. The Cupertino based company claims that the damage award on two phones which were vacated by Koh, should remain as part of the original $1 billion verdict. The two phones are the Samsung Galaxy S II and the Samsung Infuse 4G. While we have no idea when Judge Koh will get to this filing, the second damages trial will start once Samsung has concluded its appellate proceedings.