Teensy 3.2 and General pinouts questions hand held game

Hi guys

I'm working on a hand held game system based on the Gamebuino library but I'm doing a lil advancing by upgrading the screen to color and replacing the flash and processor for better graphics and games. Working name is Gamebuino Ascended.

Any way I was looking at the schematics here......

http://gamebuino.com/wiki/images/6/6f/Gamebuino_r2_schematics.pdf

And I've noticed that a couple items get are designated to go to the same pin.

Is this normal? Or are there multiple SCK pins?

The actual parts are :::

Teensy 3.2

Adafruit power boost 500 for charging and stepping up 3.7 to 5.

Inhaos LCD 2000_7775

11 X momentary tactile switch buttons

And a battery yet to be found around 1000mah

Hopefully the whole system won't use a whole 500ma

All right so the second half of my question is about the tactile buttons. I need 11 inputs for 11 buttons

Is there a way to do that many with the Teensy?