I figured it out for you numbskulls.
I went to my phone to pay, and when submitting there is a popup saying "we think your zip code is wrong" because it wants to add the extra digits for the POB. As a note, no, it isn't wrong.
The desktop browser page is **bleep**, so it appears to be choking on this.
And we are to expect that your results are 100% accurate?
Yeah, sure.
