I'm Ann, from the team here at Shopify :)
I went ahead and took a look at your store and I was actually able to spot two pop ups for your newsletter. Take a look at what came up for me:
You should be able to see two newsletter pops ups there. These came up for me after a few moments of looking at your storefront, so they aren't coming up right away. That said, depending on how you added these pop ups, it's possible that you might be able to shorten the amount of time it takes for these to appear. It looks like one of the pop up is coming from Privy, you can reach out to them directly to learn more about how to do that, their contact information is located on their app store's page.
As for your second pop up, I'm not too sure where that one is coming from, but if you need a hand identifying it, let me know.
I hope this helps! If you have any more questions or concerns feel free to reach out to us on this thread :)
Have a great one,