iAd Interstitial Ads Example and Issues

I am trying to implement interstitial ads into my app. I have it kind of working but its bazaar. This first screen pops up when PresentInView is called (screenshot). Notice there is no close (X) button. If I click on the ad, it takes me to a fancy test ad that does have a close button. Once you close it, you just come back to this screen. There is no way to get rid of the screen, I have to kill the app. So a few questions.

1. Does anyone have a simple example of using interstitial ads in Xamarin
2. Is this screen just because its a test ad? If so, how do you close it?

Thanks!