I now think that the Darling boys are the ones who brought baby Henry to town. Because they work for PP, they had some magic that allowed them to find the town, even though it was invisible. That means that even if Belle’s put the cloaking spell up now, the Darling boys will still be able to find SB and get in, and that’s what they were shooting with the car. PP probably wants to be kept up to date on what’s happening back there right now, so it’d make sense for him to send in spies.