Finally got a technician in today, so I will post a summary so that others who do run into this problem have an idea of what's going on.
Two days before my install, I received a call from Bell offering their "Hollywood" package (with premium movie channels) free for two months, to which I said sure. It appears that overnight Saturday, after my install, the box programming got updated to reflect this and ended up wiping my programming completely. The technician was taken aback as he hadn't encountered this before, but the head tech on the line knew of the problem as soon as buddy explained it to him and said he'd seen it happening more frequently recently.
TL;DR: If you run into such an error, it is a programming issue. No need to have a tech called in, but customer service and lvl 1 techs won't have a clue what's going on. You need to have the issue looked into by the programming department. It's a pretty quick fix.