Fred,
Even when I have borderless checked, it still resizes everything when I remove the white area from the bottom.
Why is that happening?

I'm going to have to start over here because in this thread we have a completely different setup (100 inch length) than the other thread.  And now, you've added a 24 inch print to paper that can only hold a 23.601 inch print so now we're dealing with a poster.  That complicates things.  That 2x1 on your first screen shot is telling you that you are going to have a poster where 23.601 inches will be printed and then you'll get a sliver that is .399 inches wide and 24 inches tall.  That may be the reason the driver is responding the way it is when you tell it to remove white space.

Here, you are going to have to do the same thing you did in the other thread, which is one of two things:

(1) Print a 23.601 x 24 so that your print fits on the width of the roll.  Then remove white space if you need to.  Should work better because we won't be dealing with a print that doesn't fit on the page to begin with.

(2) Activate borderless so you can fit a 24 x 24 but if you have a 24 inch roll, be aware that it will be nearly impossible to print exactly 24 inches wide on a 24 inch roll without there being some slight alignment problem by the time the entire print feeds: either that or you have to put up with expansion.

I would have to look into Canon's new specification for "Fit paper Size" under borderless.  Technically you should be able to select "print image with actual size" but it's grayed out.   Any time you see the word "fit" or "scale", you know the driver is going to mess with the actual size and change it, so you should really be selecting "print image with actual size".  Not sure why it is grayed out.

OK, I looked it up.  Here's Canon's explanation (from the PDF manuals):

Borderless Printing Print Image with Actual Size Prints originals at actual size, without enlarging or reducing them.

Borderless Printing Fit Paper Size Enlarge or reduce the original to match the size of the paper you are using.

So clearly you should be selecting "print image with actual size" if you don't want the driver overriding what Qimage Ultimate sends and mucking with the size.

Mike