"add To Cart" Instead Of "book Now" Showing On Special Event Page

I have a special event page which should be showing a "book now" button requiring customers to choose a time slot, but is instead just showing a "add to cart" button which immediately adds it to the cart like an ordinary product.

https://clients.petruzzo.com/dailyheadshot/headshot_day_in_bowie_-_november_12th_1200pm_-_400pm/

I've checked and double checked the settings. This is a duplication of a previous event which was working fine, though that previous event is now showing the same behavior.

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The problem seemed to apply to anything created in that section. I solved the problem by creating a new section and moving the page to the new section and that fixed the problem. I don't know what happened to that section though. It was set up correctly under the booking calendar.

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