Re: not my contacts
Hmmm... sounds like a cookie or caching issue remembering the previous user. Or browser security settings were changed.
Make sure the browser has UNCHECKED: "Remember logins and passwords for websites"
In Chrome turn OFF:
Automatically sign in to websites using stored credentials. If disabled, you will be asked for confirmation every time before signing in to a website.
"Worry is a misuse of imagination." ~Unknown