You have to click the little "Show ratings" button in the middle of the page to see these comments! Not easy for new users to pick up on it. It appears as if these two users are old, reputable and trusted. But just look at what 99% of their actual feedback says. They are scum bags to say the least.
All the feedbacks in the "Untrusted feedbacks" section are either from those who are red tagged or from the one's who have no positive trust ratings themselves, that is the reason why they are categorized as "Untrusted feedbacks" because they have no meaning at all. Even i can post a negative feedback on your profile, saying that you scammed me for 2 bitcoins, and this feedback will get a place in "Untrusted feedbacks" which won't have any effect on your account nor someone will believe my comment at all. So this is all shit, but nothing true. A feedback that is to be noticed does not need to be checked in "Untrusted feedbacks", but it will appear infront of you when you open someone's trust page.