Job description saying "Bachelors or Masters preffered"

[solenugget]

My company just completed the mandatory recruitment period for my perm process.
They wish to move ahead and file my ETA 9089, but I recently came to know that the job description that they used during the recruitment period said the requirement as "Bachelors or Masters (preferred)".

Based on this information, the lawyers at my company wish to file my application under the EB3 category, even though I have a masters degree from a reputed school.
Would it be a good idea to go ahead and file the application under EB3 category?

Can my supervisor edit my job description when applying my PERM application and edit "Bachelor or Mater's preferred" to "Master's required" and start the process again to file my application under the EB2 category?

Thanks

[immihelp]

If the job requires masters and you have it, you can file under EB2.

Even if you have masters but if the job does not require it, you can only file EB3.