My I-140 and I-485 was filed concurrently in Dec 2002. I-140 got approved in EB2 in Dec 2004. Then 485 was stuck in Name check process. In october 2006 got 3rd FP so contact senator for status of I-485. VSC replied that my case is in EB3 and visa number is not available so case cannot be approved at this time. On explaining VSC through senator that I had an approval in EB2, VSC sent an ammended I-140 saying case is approved in EB3 in March 2007. Can I convert this case back to EB2?