When I tried to share a note with my wife's email address, Evernote thought the email address belonged to someone else. I checked my Contacts and her address was NOT associated with the person that Evernote was associating it with. The address I was using was not hard-coded in her Contact entry, though there was a gray suggestion from Siri that the address was hers based on emails we have exchanged. I added it for real, rather than leaving it to Siri to infer it, and then Evernote picked up the correct association. Seems like a bug. Where the heck did Evernote get the wrong info from, I wonder.