Thanks for all of your replies.
I don't really care about the scores, it just strikes me....however much I read, that there will always be a statistical possibility that for example 50% of children in a given year could achieve above 121 ( or whatever the score might be), creating a nightmare for many looking for a place. It was this coupled with the apparently anomalous scores this year and what seems to be a higher pass rate that it could be the case this year if the education people have messed up. You only have to look at the various GCSE and A level marking debacles that have occurred recently to at least view the whole thing with a certain degree of cynicism.
I think that many of the explanations of how the whole scoring thing works are ridiculous, they assume quite a high level of understanding on the part of the reader, who in many cases (like me) did not even pass the 11+ or attend a grammar themselves