Set permanent location for images in windows 8 app

Hello,

So I created my windows 8 app and it runs fine, but the problem I am having is that whenever I put an image in its own grid or in a view box control but still the images that are on the edges always end up being skewed or moved up into a location I did not place it when I made it. I created it using the 1366x768 resolution and when I try to test it those images are skewed.

How do I set a permanent location for these images so that they adjust in whatever resolution they are in?

Thanks guys!