Project file is changed due to project reference re-order

We are developing an iOS and Android application and we use both Xamarin Studio on the Mac and Visual Studio with Xamarin plugin on Windows.

The Android project references the new Google Play Services component. When you view the project in the respective solution explorer, the project reference orders are different:

On Mac, the project reference order is: GooglePlayServicesLib, Xamarin.Mobile.dll, Mono.Android, System On Windows, the project reference order is: GooglePlayServicesLib, Mono.Android, System, Xamarin.Mobile.dll (alphabetical order)

I believe the reason the project file is marked as changed is because the respective platform is changing the project reference order each time the solution is open. Any ideas?

Thanks.

Glenn