Popup frequency

Hi! Really great plugin, thanks so much!
I have a question regarding Popup frequency: I don’t know if I misunderstand something, but when I select “Once per session” or “Once per 24h” (or less hours), shouldn’t the pop up appear only once when I visit it with the same browser, for only several minutes? I can’t make it work this way! It appears in every single page of the website, even the ones already visited in the session!

Thanks a lot and keep up the great job!

https://wordpress.org/plugins/search-exclude/