I agree that there appears to be an issue. I'd suggest editing your post and adding the "bug" tag, so that the technical folks here will be alerted and can investigate.
I believe that most of the DNA reporting/propagation features here correctly take into account the non-biological status of a relationship. But it appears that the X-Chromosome section of the DNA Ancestors tab of a profile's DNA option does not correctly take into account non-biological relationships. For example, on your DNA Ancestors tab, while your grandfathers are both correctly identified as non-biological at the top of the page, and your paternal grandfather is correctly identified as non-biological in the Y Chromosome section, your maternal grandfather and his ancestors are incorrectly shown as potential X DNA contributors in the X Chromosome section, when instead your maternal grandfather should be identified as non-biological and his ancestors not listed there.
Similarly, I believe that the DNA Confirmation tab does not correctly take into account non-biological relationships. For example, on your DNA Confirmation tab, it suggests using DNA to confirm that your father (2) is son of your paternal grandfather (4), and also to confirm that your mother (3) is daughter of your maternal grandfather (6). Both of those relationships you've indicated (and other DNA features reflect) are marked as non-biological. I don't believe that either of your grandfathers nor any of their ancestors should appear on your DNA Ancestor Confirmation page, since they are not your DNA ancestors.
Here's a related earlier post. I don't see an existing associated DNA tracked bug.