People aren't monolithic, and neither are spren actually. If you look at Kaladin, he listens to those who have not been heard, he's literally a healer! He's a soldier and he has chosen to stand where others fall. He has freed people from bondage and he's open-minded too. He has the characteristics to be an exemplary Edgedancer or Stoneward or Willshaper. The thing with the ancient Radiant Orders is that they lasted long enough for each Order to become a culture, but even so, there were still people who didn't fit the mold perfectly. I mean, a Knight Radiant is ideally someone who exemplifies their Order's characteristics but all you really need to be a Knight Radiant is convince a spren to Bond with you. Which Order you get depends on the spren, sometimes spren are attracted to people who exemplify certain characteristics, sometimes they choose to Bond certain people simply to try to help them, sometimes it's just a matter of convenience. Even if the Knight Radiant in question is a bastion of their Order's Ideals, they are still people with other facets to their personalities or they might choose to express their Ideals a bit differently. Same goes for spren, as we see in this book.
Relador Bonded an Honorspren and the things he did were honorable things from his and his spren's point-of-view, and that's that, really.