Hi Jeff,
I've tried all the things suggested in this comment thread Apple Pay Receipt going to wrong email. - Apple Community
It's definitely my BJs account, that family member has never been connected and does not have a BJs account of their own. That email doesn't show up under my ME contact card at all either. I had used the contact card solution to stop my receipts from getting sent to my work email, but now they're getting sent to this family member instead even though only my my personal email is listed everywhere I look now, and I can't find my family member's email listed anywhere.
My best guess is that it has something to do with a credit card connected to that person being listed as the first one when I go to Apple Account and select my iphone from the device list. When I scroll down that card is the first to be listed. But when I look at any of the details or settings for my wallet anywhere I can find, it doesn't show an email associated with it. It's not set as my default card in Wallet either.
It gives the option to "Remove Items" in the Device info, but I'm not sure if that will let me select which ones I want to delete, or if selecting that will delete ALL the associated payment methods.