Yes this is why I said a toggle for unchecking the skew measurement would be an option appreciated by narrow roll users.
In any case I tried a fairly long piece in the roll slot, loaded as a sheet and it does as expected. In ImagePrint you need only quickly designate the page size, or just width, then click on as many images as you want for auto placement. I often use the front catch tray bar as a take up spool , so that's not a huge problem. A kludge of course, trying to circumvent the A3 width limit on roll sizes.