Same here, I had three e-mails listed: my personal email I used for Facebook, my @facebook.com email, and a work e-mail that I don't appear to have listed in my profile or settings anywhere and don't recall even giving to Facebook.
Perhaps the "merged" contact information that got leaked included e-mails for you that your acquaintance had that you perhaps never told Facebook about?
EDIT: that would seem to be supported by this line:
"This contact information was provided by other people on Facebook and was not necessarily accurate, but was inadvertently included with the contacts of the person using the DYI tool."
kinofcain|12 years ago
Perhaps the "merged" contact information that got leaked included e-mails for you that your acquaintance had that you perhaps never told Facebook about?
EDIT: that would seem to be supported by this line:
"This contact information was provided by other people on Facebook and was not necessarily accurate, but was inadvertently included with the contacts of the person using the DYI tool."
eminh|12 years ago
Basically, it means that facebook has more (much more?) information about me, than they show to me in the profile. Not that I am surprised by that.