Schedule inconsistencies and time wastages.

I travel with the bus from Sandton to Randburg (Route S4) daily for work. I’m not opposed to waiting for the bus, but it appears that busses are only arriving every 20 minutes, rather than every 10. This morning I waiting 25 minutes for a bus which is supposed to leave the station every 10 minutes (and I’m at the first stop after the station). Something I have noticed is unnecessarily long stagnancy periods halfway through the route. After work I get on the bus at Brigh****er Commons stop. On yesterday’s trip, we arrived at thw midpoint point of the route (Damelin) at 15:59 which is the time the bus is supposed to be leave that stop. Instead of leaving immediately, the bus stood stagnant for another 10 minutes to leave at 16:09. The service claims to do their best to be on time but perhaps a large reason for their schedule deviations are due to these unnecessary delays at the midpoint of the route.