I-140 amendment with new company

H1BTo..

New Member
Current status H1B - Mar,2012.
While working for company A
Labor was filed on Nov,2007 and got approval in Feb, 2008.
Filed I-140 in May,2008 and got approval in Oct,2008.

In the mean time company B took over company A, but kept my payroll on company A tax ID.

In Jan,2009 company B moved me to their Tax ID, but forgot to amend my H1.

Now they are filing my H1 amendment and also I-140 amendment.

1. Is my work status ok and with in law?

2. If I change my company before the I-140 amendment go through, can I keep my priority date?
 
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