Your comments

Thank you for contacting me Annie, here follows the one member that raised the issue:
Surrey Location, 
Danny Lau #9582330
I'm not sure if he used his friend email by accident (non likely [email protected]) and even created a family setting in Surrey.
Burnaby Location
Vincent Lee #9234773

He has Danny as a family member, since they are friends, so I presumed that Danny added Surrey as the second location while under Vincent family account in Burnaby and CourtReserve "assumed" that [email protected] was his email as well.

I believe you can look a bit deeper, since you can see who created Danny's account in Surrey if it was through a regular registration using the email or if he created it using the family account and added Surrey as second location.