Im working with QU demo; Im trying to set it up to print on Hahnemuhle fine art matte (I have the ICC profiles); if I try to select any of the "fine art" media types on 8.5X11.5, it forces me to change to "art letter (margin 35)". If I select "matte photo" media type, 8.5X11.5 is accepted.
I have a similar driver here to have a look for you; a Canon Pro 9000 II
It does the same thing in this driver, but it appears that it forces a change of feed Front Tray. It also wants to force a change (as you said) to Art Letter (margin 35)
It seems that this change is a*size* change and not a paper change.
You should notice that they do not even offer an 8.5 x 11 paper size for you to select.
They must have a reason for forcing that paper size. It allows a printable area of 8.24 x 8.0
So I would keep the profile, and the instructions on what paper to select (Fine Art Premium Matte) and make my print!
Hope I helped.
Fred