One has to wonder who is in charge of On Demand at Comcast, since this has been a reoccuring problem, where shows one had no problem accessing in prior weeks are suddenly either not posted (episode skipped) or Comcast has assigned a date that it want one to watch the show, as opposed to its being available -- at a minimum -- the day after it airs. Since the pattern seems to be that this happens around holiday periods, where people who actually know what they're doing may be taking time off, I suspect that Comcast outsources this responsibility to people who either don't understand the concept of On Demand or just don't care. C'mon, Comcast, get your head outta your you-know-what and address this on-going problem.
I encountered the same problem. I do not think it makes sense to hold episode 7 for viewing AFTER episode 8 has aired. This is not the common way major network programs promote on-demand viewing and series/network loyalty.