Aha. Now I will proceed to convey to Paul all the answers to the universe in a direct, easy-to-digest manner.
Both answers are correct. In other words, each soul gets his/her own universe to play in. At the same time, they all participate in a single multi-player universe.
How is this possible? Well, very simply, you must understand that your universe is dynamic. It is always shifting, changing, moving, and its parameters are not fixed. Same for every other soul's universe.
At the same time, your thoughts create your reality. So your thoughts draw into your universe every occurrence, event, person, thing etc that appears into the universe.
Thus your thoughts also draw other souls to participate in your reality. But at the same time, you are participating in their reality, because they, by their own thoughts, have drawn you into it.
The role they play in your reality depends on your thoughts. The role you play in their reality depends on their thoughts. When thoughts change, the roles played by the respective souls in each other's reality may change, or they may drop out of each other's reality completely.
If the thoughts are incompatible, the relevant souls would simply not be drawn into each other's reality at all.