HaveVisa stamping from A till Nov2014.Transf to B, visit india without stmpng, willItBe aproblemlater

I have stamping from company A till nov-2014. I have changed my job now to company B and have a new I 797 through H1 transfer. I plan to visit india in August 2014. Do I need to attend stamping? I also plan to visit India again after Nov 2014 by when my visa from old employer would be invalid. If I attend stamping then, will there be any problem or do I need to carry any specific documents to justify why i did not attend stamping when I entered India when my old employer’s visa was valid? Please advise what is the right thing to do?