great feedback, all, and you're absolutely right that i can't be sure it was using the same account in two different locations that flagged me for this message, but i do follow many of the same practices that you've all mentioned.
i had also opened another unrelated AP account within a few days of that one and hadn't accessed the account from multiple locations as with the others, so i assumed IP was the distinguishing factor. but i can't be sure and it could certainly be an address verification flag or any number of other things.
so it's purely anecdotal, but also not a positive development.