Thanks, ack! Two more questions.

In my certified ETA750A, education requirement is Master Degree; The experience requirement is 1 year.

I never saw job post. HR told me that the job post has "Master+ 1 year" as required and "Bachelor + 3 year" as eqivalent. Does CIS have access the job post?

In I140, my attorney selected EB2. For filing I140, my attorney prepared a cover letter (Employer Support Letter). This cover letter also has "Master+ 1 year" as required and "Bachelor + 3 year" as equivalent.
Is cover letter as important as certified ETA750A?