Masters Racing Cats results

I did the ZHR Masters D Race this morning. D being for 60-69 year olds. Afterwards looking at those that raced with me and in ZP reults they are not in that age group. Firstly, why do people enter the wrong cat and secondly why do they feature in results? Why are they not DQ automatically.

It may take a while to update results but if you registered as a D your results will either be g or h. Registration in master races are in 10 year increments but results are in 5 yr increments.