[VDZ]

Spoiler:

One thing that keeps coming up in your post is referring to Self as being somewhere at some point in time. This cannot be correct, as self is a 0-dimensional being. Something one-dimensional exists at a certain varying X at a given moment in time. Something two-dimensional exists at a certain varying X and Y at a given moment in time, and the same is true with X, Y and Z for three-dimensional things and beings (you are sitting at your computer right now, while a couple of hours later you'll be elsewhere). A 0-dimensional being, on the other hand, is nowhere and everywhere at any given moment in time. Trying to say he is somewhere at some point in time is meaningless. As such, 'Self' itself cannot be trapped in any point or period of time.

For this person, there is no past.
For this person, there is no future.
To be more accurate, the concept of time does not exist for this person.
For this person, the past, the present, and the future
are all condensed into a single point.
Point.
Emptiness.
0th dimension.
Three concepts that overlap.
This person exists in a place devoid of everything.

'Post-2012 Satoru' and 'Self' are not completely interchangable; Post-2012 Satoru is part of Self. It's like how we're discussing this on the Games forum of AnimeSuki; we can say we're posting this on AnimeSuki, but not every post on AnimeSuki is also a Games forum post. Satoru can do things as 'Self', but interacting with 'Self' is not the same as interacting with Satoru.