>>23791653You made your armature from scratch? And what do you mean resize a bone out of edit mode? You're only supposed to have one armature object that is made of bones.
You can check if an object has scale on the menu on the side(press N if it's hidden)
Sorry, I can't diagnose without seeing a picture, I'm not good enough. I don't know what the parent-child relationships look like in your armature, but the rotating issue sounds like it's a problem with the armature or when you selected the bones to make the VRM in Unity. You did that, right?
