Yeah, I saw that. Marshall was on yesterday and Monday, however, Heather has been gone all week. Even Jen Carfagno filled Heather's spot on Monday with Eboni Deon on travel. IIRC, that is the first time in ages that Jen has anchored YWT not assuming the travel analyst position.
YWT used to be real strict on their substitutions. The main subs consisted of Nicole and Bill all the time, due to the unfrequent absences of Marshall and Heather. Nowadays, I've seen Kevin, Nick Walker, and other outsider OCMs fill-in.
