Hey there. Thank you for playing and liking our game. <3
Now to your questions.
1) I think I missed adding that scene to the gallery. I will try to do that for the next update though I can't promise it.
2) That is an oversight. We had a third ending planned but removed it later on. So I just deleted the choice instead of removing it.
3) We are still on the fence about this. We might remove the victory scenes since we will have a lot of new stuff with the companion stuff we add the next update.