Thank you so much for playing and for the bug report! I'm so sorry you had to bear with so many issues ;; I imagine the reason for the ending 2 happening every time might be that if you restart from that scene itself without redoing the first Guardian, the decisions necessary for it will have already happened, but I'll check if it happens even if that's not the case. Feel free to send me the save, that will definitely help fix all the issues!
Still, I'm glad you enjoyed the game!! And thank you for recording it! As for a hint for ending 3, during the first two guardians, try making decisions that don't align with the Hero's plans even if it's with good intentions.
Thank you so much for checking out more of my games too!! I'm glad you enjoyed it! :'D
EDIT: I updated the game with a hopefully fixed scene select menu! I recommend making a new save to avoid any conflicts, but it should be working better now if I didn't miss anything. :')