The cover wrap for KDP looked off-centre, and the bleed cut into my cover. Is that fixed?

Yes, in version 1.9.20. Before, the Cover Studio's print wrap stretched each cover over its face and the bleed around it, so the design sat slightly off-centre and KDP's trim cut into it, much more on trim sizes that are not 6 × 9. Now each cover is placed exactly on its trim, centred, and the bleed around it is made from the picture's own edge, so nothing of the design is lost when KDP trims the book. If your cover's proportions differ from the trim size you chose, the preview warns you and says how much would be cut. Make the wrap again in the Covers page to get the corrected file.