On Sun, 27 Mar 2005 09:19:12 -0800, TheOneKEA wrote:
What could have caused this rather unusual anomaly?

The fact prepay relies on a computer system, and all government computer
systems are inherrently shoddy. Buy a paper ticket, and you have proof of
travel. Buy oyster and you're hoping that it works lest you get charge a
penalty fare, or even end up in court.
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Everything I write here is my personal opinion, and should not be taken as fact.