Project 11 Schematic

Can anyone help me understand the project 11 schematic? It looks like the Vss and Led - pins are both connected to 5v through the potentiometer, and then they are both connected to ground. However, in the diagram (not the circuit schematic), they both just connect to ground.

I'm pretty much a complete novice and don't have any formal electronics education yet so be gentle.

Thanks!

EDIT: Whoops meant to post this in the starter kit section... could a mod please move?


the Vss and Led - pins are both connected to ground.