Thank you for your reply. I attached an image displaying my problems. So...in the first example I add Text Gallery to the "Card" control (I selected the first template for the screen...see second image) in the second example I add it to the empty screen. In the first example "Gallery2.Selected" is not getting selected, in the second example "Gallery3.Selected" is set correctly.
This is selected for the screen option (unlimited slide option) where Gallery selection is not working.