Please read other posting you can file two I-485 if they are based on diffrent LC and difrent employer offer of future job
read below
http://www.immigrationportal.com/sh...;threadid=91538
http://www.immigrationportal.com/sh...;threadid=90159
http://www.immigrationportal.com/sh...;threadid=88178
http://www.immigrationportal.com/sh...;threadid=91870
http://www.immigrationportal.com/showthread.php?s=&threadid=96790
http://www.immigrationportal.com/showthread.php?s=&threadid=96226
http://www.immigrationportal.com/showthread.php?s=&threadid=94820
http://www.immigrationportal.com/showthread.php?s=&threadid=93860
read below
http://www.immigrationportal.com/sh...;threadid=91538
http://www.immigrationportal.com/sh...;threadid=90159
http://www.immigrationportal.com/sh...;threadid=88178
http://www.immigrationportal.com/sh...;threadid=91870
http://www.immigrationportal.com/showthread.php?s=&threadid=96790
http://www.immigrationportal.com/showthread.php?s=&threadid=96226
http://www.immigrationportal.com/showthread.php?s=&threadid=94820
http://www.immigrationportal.com/showthread.php?s=&threadid=93860