"Yes it should have been highlighted I must of missed it since it was between two that were commented"
And I know it's not a one-time thing. She does this ALL THE TIME. She really doesn't know that it's "must have" instead of "must of".
ETA: And because I'm apparently not in a very forgiving mood today:
From a client...an attorney...A FREAKING PARTNER:
"Are there isle seats available on these flights?"