viewport problem in Edge Animate (was: viewport problem)

Hello, I am working on a web site, and I have to make it work on mobile device.

Currently I am testing on a Microsoft Surface 1 / internet explorer 11 and my problem is that each time I touch the screen to have an action in my web site, the all screen move.

I read different think about Viewport, but I don't have any result to fix the screen, is anyone have a solution for that ?

thanks