SOS Survey through e-mail does not reset answers for every user!

Hello SAP Guru’s

Currently we are sending a survey through an Automated Campaign by E-mail.

The Mail gets perfectly to every BP e-mail address in the segment, I used 5 different e-mail addresses to test my scenario, but I’m facing problems with the answers in the survey.  For example:

1. I try with USER 1 log in to access the survey, answer it, and save the answers.
2. Then I log in with USER 2 and when I access the survey, it remains the answers of USER 1 and I would expect the survey to be reset because a different user is answering.

Is there any standard way to accomplish this requirement or did I miss any configuration?

If you could please kindly, advise!

Regards,

Sue Mak