No problem at all.
Infact it will be treated as good thing. Every year we get salary raise and if it is a substantial amount, you are proving your worth to US economy when ppl getting downgrading salary.
It happend to me too. My salary is 42% higher then the original labor which was filed in 2000. Now it is 2004, I had 4 salry raise and it is more then the labor stated salary. Nothing wrong with that. INS will treat as a good gesture.