as long as your "Proofferd wage" is equal to or more than "Prevailing Wage" you
Find out more with your attorney. The offer letter / employement that your employer is going to give you is "Pro-Offered". THis always should be => (equal to or greater than Prevailing wage". Prevailing wage is already determinced for you. Find out with your attorney about it. Think it is X, your present salary is Y. If the equation is like Y=>X, you are fine. Otherwise, you might be in trouble. if it greater that is better.
I had the same case, but my equation of "Y is 4K more than X" , so I escaped.
for your questions 1 and 2) All you need to do is find another job with same description (the offer letter should clearly mention to avoid hassles), same salary as described in labor (not your PREVIOUS salary), in the same area where your labor raised.
Hope it helps.