I can accept that she knows his name from the get-go, but HE doesn't know that she knows his name. The exchange when she orders him to come to the mayors house has him react quite strongly to her knowing his name when he hasn't given it to her. If he's going to react that way, then it should either happen right at the start when he meets her and she uses his name, or she should hide the fact she knows his name to make the "come to see the mayor" scene consistent. It sticks out also because he reacts strongly to Rayford knowing his name, and even
I know it's a tough thing to address because you're not going to re-record voice lines, but perhaps the "Mr. Roehm" can be edited out of the end of that line and it'll still sound resolved, or perhaps a line like "Thank you, sir" could be used in its place.