I suggest we handle this just like we handle the EAD/AP renewals, always post the latest information in the cell and move the old info to either the cell comments or the comments column. See my row (joyd) for EAD/AP for an example.
Did everyone see the latest processing dates btw? I expect this is a mistake, but the I-485 date just jumped to June 6th, 2003 . See http://boards.immigration.com/showthread.php?t=147847&page=4 for more info.