Wow, Just Cancel a Train

BART is absolutely amazing sometimes (and I ain't trying to flatter in this case). I had read from a post how the play with train schedules to keep things on-time, or make it look like things are on-time, but I shrugged it off as a joke; why would BART (with it's own tracks, and little outside interference) puposely pull trains from the schedule to boost on-time performance? Well, I witnessed it this morning at the Pittsburg station. At 8:15, the LED boards SAID A 9 car train was at the platform. Since Pittsburg is the end of the line, that usually means a train is coming in on what is typically the outbound platform. So, we stood around for 3 minutes and waited and eventually the LED boards cleared, but no train appeared. Next thing I know, the LED boards now say a train was arriving in 2 minutes; by this time it is 8:19. Finally the appears, late and pulling in on the outbound platform (just as I suspected). Well, I would have thought we would pull out immediately since it was 8:20, but I guess Verizon Wireless's time must have been off, because someone made a decision that the train was so late already that it made it litle sense to leave. We finally pulled out at the 8:32 slot; no explanation, apology, just "this is a San Francisco bound train". Now, for those of you who want to say, well they probably turned around another train to cocmpensate and pick up riders further back up on the line, HA! I am on the last car and all seats are taken at Pleasant Hill. What happened to the 8:17 train out of Pittsburg, or if this is that train, what happens to the 8:32 train we bumped?