Never see this message again not working, users seeing popup straight away

Hi there,
I am using the popup to advertise a competition which captures user data. I want it to pop up once, after 10 seconds on the site, and then never appear again if closed or if "Never see this message again" clicked.
I've attached a screenshot of our settings (but have now disabled the plugin after users complaints that it won't go away).
Any advice on how to get it running smoothly much appreciated.
Tessa