A user can login to the e-satisfaction dashboard multiple times from different devices, either desktop or mobile.
Each time a user is logged in, a session is created along with an access token, they are called "Active Sessions".
Each user can see their active sessions from the user profile, under the section "Settings":
You should be able to see, for each session, the following:
When it was created
The browser
The IP
The list item marked as "Current Session" is the current session of the user and it's different for each device.
If you are not sure when and by whom all the other sessions were created, you can click on the "Log out of all sessions" button and will delete all other sessions except from the current one.
NOTE: If you share your account with other users, they might loose their working copy.