A drawer with two part types is one label, so the page, the preview, the
print loop and the PDF all work from plan_groups rather than iterating
the selection. The preview takes the parts that share a label, and the
page reports how much tape the run will use.
Printing redirected back to a bare tape page, so every option - rotation
most visibly - reverted to the default the moment you pressed Print.
Carry the chosen options through the redirect instead.
Also read tape_rotate_default so an untick can be made permanent in
Settings; it only applies to a fresh arrival, never over an explicit
choice on the page.
jessikitty