Hi! I'm sorry you're having trouble getting Dyson's ending. The walkthrough is written for playing with day planning turned off, as the planner introduces too many other variables.
What happened, in case you're curious, is a common bug where, by getting too many points with Gunnar while on Dyson's route, the game gets confused and gives you the polyamorous ending. This will be corrected in the remasered version of the game.
But, yeah, it was my first game and I didn't know what I was doing, so it's got a lot of... quirks.
If you still care about who's polyamorous and who's not, as per your first comment, the polyamorous route is Dyson and Gunnar. Gunnar isn't typically polyamorous in general, but Dyson is an exception for him. Paz isn't fully polyamorous, but dragons have a cultural standard of women taking many lovers. However, there is no in-game polyamorous content for Paz.
I hope any of this is helpful. If you have other questions, I'm happy to answer!