Mvvm ApplicationBar Problems



I am having 2 problems. When I design my wp7 view in Blend Expressions everything looks fine, but when I run it some controls just disappear, it seems to be because of the app bar.

It seem to push some stuff up. How do I account for this. I am not sure how to stop it.

I also noticed that if I go a view with the App bar on it and then go another view and back to the original view the app bar looses everything in it(ie icons).

Anyone else getting that?