Friday the 13th - 2 coaches of a local train derail at CST station

Local trains (Mumbai central line) were running late in the morning of 13th November 2009. But the commuters were unaware of the reason. This time, 2 coaches of a train from Kasara derailed at platform number 6 of CST (Chhatrapati Shivaji Terminus) station. The derailment happened at 7 in the morning obviously affecting the train services in the central line.

By the way, on 11th November too a train from Kalyan had derailed at CST. On November 4, 12 coaches of Gandhidham Bangalore Express from Ahmedabad to Bangalore derailed at Dombivli. What's wrong with the Railways? Or are these derailments sheer coincidences?