Public Record bedroom number is different than the advertised bedroom number

[Ryan Lee]

Public Record bedroom number is different than the advertised bedroom number.
For instance, Public record and tax assessor says 4, while advertised bedroom number on MLS/listing is 5.

The listing agent insists that the bedroom number is correct and that assessor and public information are wrong.

What steps do I need to ensure that the advertised bedroom number is correct?

My concern is that they added a room without permit(Not permitted work).