Someone else had this problem....

what the had to do was to
1) change their mailing address to a USA address....
2)..then go to every field and make sure it was entirely blank...
3)  .then switch back to their Foreign address
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If that doesn't work, repeat steps 1 and 2, then log out so that the change gets posted/saved to every form.  Then log bac in and go to step 3 to complete the operations.