logging in to Presenter simultaneously not possible?

I'm a total newbie when it comes to Presenter and Planning, hence these questions.
We are currently two users on our account. I noticed the other day that when I was logged into Presenter (my level is sys. admin.) I was kicked out when my friend (admin. ) logged in with a different email address. So is it like this, that you can't be logged in at the same time even though you have separate email addresses?

That's one of the restrictions of the free account; only one person can be logged in at a time. In fact, you have to buy the Pro Plus plan to have multiple simultaneous sessions. See https://www.worshiptools.com/en-us/pricing.