Time-line inconsistency from Quidditch

[steve at nyls.com]

I do not know if this was picked up previously.

In Chapter 8 of Goblet, Ludo Bagman, welcomes everyone to the "four 
hundred and twenty second Quidditch World Cup".  WRONG!!  Quidditch 
through the Ages sets forth the history of the World Cup 
competition.  It says that the Cup was first held in 1473, and held 
every 4 years since.  
 
That means that the Cup was held around 130 times by 1994.  Not even 
close to 422.
 
Also, (and perhaps more importantly) if the Cup is held every four 
years from 1473, then 1993 and 1997 would be Cup-years, not 1994, 
which is a problem with the time line, as it currently exists.
 
I hope you find this as interesting as I did.