Duplicate value found in v-for when searching for users in Kiosk + other issues

I am not sure why but I am unable to search for users in my kiosk. When I search for users, I get the following message in the console (about 200+ times).

Click here to see message in console: http://imgur.com/XlS0VIr

In addition, the page shows hundreds of "broken"users.

Click here to see hundreds of broken users: http://imgur.com/ELFMZLQ

Finally, this may or may not be related, but if I go to the subscription tab under settings, the discount box is always shown, which doesn't make sense at all. If has a v-if attribute that isn't working.

Click here to see Discount Box that is always showing: http://imgur.com/LrfJyZ6

I think somehow the global spark object is messed up, perhaps?

I appreciate any help in fixing this problem.