That is odd as we have always only been able to sign in with the same username and password at one location at a time. The other location would get signed out and a message about another user is logged in with that user id would appear.
To repeat this, try logging into spark with the same ID on two different PC’s. Have a person spark you and then start a new conversation with someone else but leave that tab open. When you chat with different people in the different spark windows one gets really messed up and starts copying the conversation from the other tabs into the other persons spark window. Really hard to explain see attached screenshot. Hopefully this picture helps illustrate the issue when chatting with two computers logged into spark with the same userID. I have removed any confidential information.
Updated: Replaced with a jpg to see all the text on the image.
