Jumping for tween camera

I set up several “tween camera to:” puzzles with time parameter of 1. When the user clicks on a button (in the example, when they click on the ‘Walls’, ‘Ceiling’, or ‘Counter’ buttons), but the camera doesn’t move, it jumps instantly to the new position and look at target. I saw in another post about the “look at” puzzle that I should swap to a static camera, do the tween (I guess on both cameras) and swap back? Is that correct?

You can see it at this link:
http://www.argosdesigns.com/ATI_Visualizer/index.html

It is a minor point for the client but it’s baffling me.