Considering just a minute and a half before, the same microphone guy made this mistake, I'm surprised they didn't remove this from the episode.

This slip up occurs while Charlotte York and Wiley Ford (the celebrity who wanted to buy the fire extinguisher) are in the limousine sharing a passionate moment (timed at around 11 minutes).

Wiley called Charlotte "Charlene" and look up, there's a microphone, once again suspended in the air! New microphone guy or bad editing? Lol