Looking at the example page it is saying that Call to Action 3353 is paused.
Will you open CTA 3353 and check to see what the pause/play state is for all your variations?
Also, just for a little information, how long have you had the Call to Action plugin installed on your WordPress? Has it been a long time? I am wondering if upgrading CTA from a very old version caused the CTA to get knocked out of it’s “play” state.