If the data is different than PSIP then maybe CFTO is transmitting it? However, I'm really not sure that if CFTO was transmitting, that using a zip form GI would actually work. I just don't know enought about TVGOS to say.
If either of you have a rotor, perhaps try pointing your antenna away from downtown Toronto enough to lose CFTO. The question in Canada has always been who is going to carry guide data here.
Another possibilty is that the DVR is capable of using analog TVGOS if available? Just a thought...
BTW, the detailed post about this unit on the *other* site, does specifically state that all outputs are active. I hope that answers the other open question.