Correction of dates in my H1 approval notice

[kavithan]

Hi, I entered into this country in Feb'2006 on H1-B with company A. Later, I transfered to company B in Sep 2006 and got the H1 approval valid till Sep 2009. Now, my H1 renewal was approved (June 15th 2009), but the dates If I see in the approval notice, I got it valid till Sep ' 2012. But, According to the 6Yr period, It should be coming only till Feb 2012. I am not sure, if my attorney had missed sending the I-797 of company A when applied for extension with company B in May 2009. Now, should I go for a correction about this? Can anyone please help me?

[sk4ih]

Yes. Check with your attorney.

[txh1b]

Any erroneous approvals by USCIS past your 6 year period cannot be used.