The BA website made me log into my BAEC account to use the BACHASE10 code, but I want to credit my flights to Alaska. I was able to clear the profile and enter a "new" traveler at booking with my Alaska number attached (and still I see the Alaska number in the booking), but the booking keeps showing up in my BA account and I'm worried that it's going to somehow accidentally credit to my BA frequent flyer number because I was logged in during booking. Anyone have any data points with this?