AC21 - Should i file in my current situation?

[SAPGURU]

My I-485 was filed in month of August 2008 under EB2 .I was laid off from my I-485 sponsoring employer(A) in month of August 09 and i took another Job with employer (B) in same field in month of Sep 09. I did not file AC21 as my previous employer's(A) attorney advised not necessary to file AC21.Now I am getting new offer from another employer(C) in same position but this new employer(C) wants me to file AC21 .

What are my options now? Should i file AC21 for employer (B) first and then file AC21 for employer (C) or should i directly file AC21 for employer (C).

I will greatly appreciate your reply.

[skynet2500]

I ran into a very strange situation today. I have been working for a big reputed company for several years. I started as an engineer and now I am an engineering manager. My labor was filed when I was engineer. Recently my lawyers found out that my position has changed and they are rigorously working to file amendment(I think this is AC21). Lawyers convinced HR that this doesn;'t impact my application - but I highly doubt that given the history of issues I had with these lawyers. Please let me know your opinion on the possibility of my application either getting rejected or getting delayed due to this change. One good this is my field hasn;t changed - I am still working in the same filed listed in my labor application.

My application is pre-approved and waiting for visa number.I am also thinking about getting back to software engineer position to avoid all the potential trouble, but my career is going to take two steps backwards.

Thanks a lot for your time.