Is this actually how its supposed to work?

But if I sign out on my phone, I am still logged in on my computer (as I would expect to be). So why when I sign out on my computer am I logged out on my other device?

I have just tested it on these forums and this isn't the case, I seem to stay logged in on my phone.

I'm actually staying logged in now, guessing something isn't quite right though somewhere.

same here on all websites that runs IPB.