When you put the screen at a certain angle, i find a lot of things begin to "hover." i think it is because things on angles are not at the same angle as the land. They are straight while the land is at an agle. this causes a floating effect, especially for a large monster.
Well, I am thinking just a new game. not an RS3, because it says a "New game." I dont really count RS3 as a new game, just an updated version. However, Jagex might think differently.