Equestria to the Human World

[LHfunk 422]

I haven't looked to see if something like this exists, so if it does, please tell me. Anyway, to the point of this. The thing that always makes me think is that when Twilight goes through the portal into the human world, we find that she's high school age. Now, it didn't seem weird until I thought about it. Since most everyone is a student, exceptions being the princesses and Granny Smith, that means everyone is high school age in Equestria. This raises questions. One is that the CMC were also at the high school, but are in like, elementary school in Equestria. Why is that? Are the schools connected? Are the fillies older then we think? The questions don't stop there either. Cheerilee appears to be the same age as most everyone else in Equestria, so how can she be a teacher if she's a high schooler? Then there's the case of Shining Armor and Big Mac. Both are older brothers to one of the mane six. But Big Mac is a student, and Shinging Armor is married to Princess Cadenece, who is probably close to Celestia and Luna's age. That doesn't make sense in any way, especially considering that both appear to be years older then AJ and Twilight. These are just some of my thoughts, and if you've noticed anything I haven't (I've definitely missed lots of things), let me know!

[SpeedIsMagic 37]

It's the Many Worlds theroy.
My theroy is of this.

 

Both universes were the same universe at one point in time.
Then they both split due to a change somwhere along the timeline.

One universe went on to become filled with sentient ponies - aka Friendship is Magic Universe.
The other with Humans -aka  Equestria Girls Universe
Thusly becoming nearly paralell universes

The banishment of the Sirens to the Equestria Girls Universe could've caused a ripple in it to where the CMC and all the foals and fillies are in Middleschool.
So many variables. So little time.