Its likely the TV is cut off too... may just not notice it. (would have to check a site like CP24 or something which has a specific frame around it).
I dont beleive, that any settings on the ROGERS remote for the box can change it.. their zoom/aspect is for channels only. More likley.. a zoom/stretch setting on the TV/TV remote itself?? (even if you dont use the tv remote, if it was on TV selected at the top, the rogers remote + the aspect button could change the TVs settings.