Of course it does.
The two alternate cathode connections simply provide some flexibility in PCB layout as there are five pins on each side of the display. The display itself uses an internal PCB mounting the LEDs, so there would be no point not using the tenth pin. There is no need to connect both pins unless the datasheet indicates that they connect to separate parts of the display.
Tutorials are frequently written in the form of "Look, I actually got this to work. I'm just so excited, I just have to share!" 