After Effects Motion Tile Help

Hi,

I'm trying to animate a little character using motion tile. It looks like the right side of the screen cuts off the design and has an enlarged arm from the character in one section. How do I get the tile to continue all the way to the edge? It looks like something similar is happening at the very bottom of the screen. I'm a very beginner at animating so I have no idea what I'm doing. I've attached a screenshot for reference.