the letter asks me to provide evidence:

"the new permanent position is in the same or similar occupational classification as the original employment.

The letter must be in the original and signed by an executive or officer of the organization who is authorized to make or confirm an offer of permanent employment."

I do not think they made mistake because at the beginning of the letter, they says my case is NIW.

So they are suck!!

Anyone had samilar trouble?

Thanks