It canna handle the load, cap'n!
In the 10 minutes after each match finishes, thousands of people all try to log on to the site at the same time to check their score. Unfortunately:
1. The site gets overloaded and some people get a 'CPU Quota Exceeded' error
2. The scores won't have been updated yet anyway, as I'll still be cycling back from the pub ;)
If you wait 10 minutes and try again the problems will usually have been resolved!