Custom Presenter not showing appropriate ViewModel when calling `ViewModel.ShowViewModel<MyViewModel>();`

CustomPresenter.cs

using System;
using Cirrious.CrossCore;
using Cirrious.MvvmCross.Binding.Touch.Views;
using Cirrious.MvvmCross.Touch.Views;
using Cirrious.MvvmCross.Touch.Views.Presenters;
using Cirrious.MvvmCross.ViewModels;
using FutureState.AppCore.ViewModels;
using FutureState.BreathingRoom.Touch.Ui.Controllers;
using FutureState.BreathingRoom.Touch.Ui.Fragments;
using MonoTouch.UIKit;
using SlidingPanels.Lib.PanelContainers;

namespace FutureState.BreathingRoom.Touch.Ui.Presenters
{
    public class CustomPresenter : MvxTouchViewPresenter
    {
        private readonly UIWindow _window;
        private UINavigationController _navigationController;

        public CustomPresenter(UIApplicationDelegate applicationDelegate, UIWindow window)
            : base(applicationDelegate, window)
        {
            _window = window;
        }

        public UIViewController RootController { get; private set; }

        public override void Show(MvxViewModelRequest request)
        {
            var viewController = (UIViewController)Mvx.Resolve<IMvxTouchViewCreator>().CreateView(request);
            RootController = new UIViewController();

            // This needs to be a Tab View
            if (request.ViewModelType == typeof(AuthViewModel))
            {
                _navigationController = new EmptyNavController(viewController);
                RootController.AddChildViewController(_navigationController);
                RootController.View.AddSubview(_navigationController.View);
            }

            if (request.ViewModelType == typeof(RootViewModel))
            {
                _navigationController = new SlidingPanelsNavController(viewController);
                RootController.AddChildViewController(_navigationController);
                RootController.View.AddSubview(_navigationController.View);

                AddSlidingPanel<NavigationFragment>(PanelType.LeftPanel, 280);
            }
            base.Show(request);
        }

        protected override void SetWindowRootViewController(UIViewController controller)
        {
            _window.AddSubview(RootController.View);
            _window.RootViewController = RootController;
        }

        protected void AddSlidingPanel<T>(PanelType panelType, float width) where T : MvxView
        {
            var nav = (SlidingPanelsNavController)_navigationController;
            var controller = new UIViewController();
            var frame = UIScreen.MainScreen.Bounds;
            frame.Width = width;
            controller.View.Frame = frame;
            var viewToAdd = (T)Activator.CreateInstance(typeof(T), width, nav);
            controller.Add(viewToAdd);

            // Insert the view into a new container (of the right type) and insert 
            // that into the sliding panels controller
            switch (panelType)
            {
                case PanelType.LeftPanel:
                    nav.InsertPanel(new LeftPanelContainer(controller));
                    break;

                case PanelType.RightPanel:
                    nav.InsertPanel(new RightPanelContainer(controller));
                    break;

                case PanelType.BottomPanel:
                    nav.InsertPanel(new BottomPanelContainer(controller));
                    break;

                default:
                    throw new ArgumentException("PanelType is invalid");
            }
        }

    }
}