Board Thread:Roblox help and discussion/@comment-38268801-20190621003601/@comment-32355740-20190622170822

To simplified it, you simply just use two or more devices within the same account you played on. It clearly said you have to disconnect from your other device in order to use the preferred device you would like to use. Or mentioned above, might forgot to log out of a device you were on. What I mean is that someone else might be using your account on the device you were on before, and you are now using a different device to play Roblox. Both of you are technically playing on the same account, just on different devices. So don't worry, you are not hacked. But always log out of your account if you are using like a shared device.