Every 126 camera I'm aware of uses a little finger to detect the one perforation per frame on 126 film and stop the advance (some also unlock the shutter release only at that point; others never lock it, and can be used with unperforated film and a little testing to know how far to advance, or original backing paper). If you load standard 35mm film, instead of one perf per frame, you have 6+ (probably best to advance by 7). Just like using single perf 16mm film in a 110 camera that depends on the perf finger, you then have to advance to stop, cover the lens, and shoot -- and repeat six or seven times for each actual frame. Of course, if you have backing and a camera that doesn't need the finger to unlock the shutter release, you can disable the finger by one means or another and avance by the backing.
Your A26 looks like it's complicated the situation a little -- it's advancing more than 1/7 of a frame, most of the time, but significantly less than a full frame. It may be that it doesn't extend the finger until near the end of the first advance stroke (assuming it has a lever type advance like the Instamatic 304 my dad had when I was eight or nine). That'll mean you'll have to do the cover lens, shoot, advance again dance, but likely only two advances per frame -- and that will likely get you wide spaced frames, but they won't overlap (if I'm reading the film strip above right).