Am I the only one to be put off by the fact that the value for filter performance - clean air diffusion rate (CADR) - is stored in the second value of the list

Am I the only one to be put off by the fact that the value for filter performance - clean air diffusion rate (CADR) - is stored in the second value of the list structure? https://en.m.wikipedia.org/wiki/CAR_and_CDR https://en.m.wikipedia.org/wiki/CAR_and_CDR