"User unsubscribed." vs. "Contact unsubscribed via email"

What’s the difference between these? My end client (the one who approved the use of mautic) keeps getting added to the do not contact list with “Contact unsubscribed via email”. So I am trying to figure out how she keeps getting added.

What’s the difference between these? My end client (the one who approved the use of mautic) keeps getting added to the do not contact list with “Contact unsubscribed via email”. So I am trying to figure out how she keeps getting added.