I only filed one I-485. My situation is that I am going to change my job and my EB2 I-140 with earlier PD is not current. While to file I-485, one needs an employment letter. So I can not file a second I-485 on June 1 when the PD of that I-140 is current.
That's why I only want to transfer PD but do not want to tranfer I-485. But I am not quite sure at this moment.
Cheers.