Looking at this I can see it's known that has uneven rows isn't working properly in winphone 8.1
https://bugzilla.xamarin.com/show_bug.cgi?id=36151
I'm having an issue that some of the items in my listviews are getting cropped off. Is there a good workaround that I can use to force my viewcells to be of varying sizes, or just larger than the default allowed size? It's working fine for me on Android.