Supertime does not work with Paypal
Unfortunately Supertime is a cart-based app, and is incompatible with dynamic checkout functionality, and the additional payments functionality in themes when you add payment providers, which bypass date collection in the cart. We recommend disabling additional payments as a checkout button like Paypal in your store's theme to make sure you capture your Supertime information. Otherwise, you can also follow up with those specific customers manually. Please read this article for instructions on how to do disable this.