It's a problem that has plagued the system since the dawn of time. But at least now they're a little more pro-active when it comes to cancellations. Back when I rode the bus there would be two or three #14's that simply never showed and calling the transit line would get you about as far as standing around at the bus stop.
I sometimes wonder if the schedule is merely a reflection of that year's budget and a visual reference of as schedule that can never be fulfilled.
Ah yes the infamous "# 14 ghost bus"; I take that bus to work any day the wife doesn't want to drop me at the office. Its convenient - a two block walk in the morning and literally a < 50 meter walk from the office on the return trip - when it shows.
Your comment re: the schedule is interesting as it does make one wonder sometimes. I also wonder what criteria are applied to the two-decker buses in terms of which routes they ply: the return # 14 all summer was a double plank then as of September its reverted to a regular bus in spite of the fact the route is heavily utilized and those buses are always packed AM & PM.