Textures overlapping, skins don't save.

So I downloaded the beta for Minecraft PE and there were a few bugs. First one occurred when I closed the game for a bit and when I opened it, all of my skins were gone. I shrugged it off and continued playing. When I opened a world. All the mob textures were glitching when a mob was moving. Including the player. Whether it's the textures overlapping each other or showing the items away from the hand. It was really weird so I decided to leave this feedback.