Aarg: Are you suggesting that the rule I'm breaking is that I didn't declare the variables in the interrupt "volatile" ?
Bulldog: The delay was because if I didn't use it, it was really hard to read the screen because the refresh was so fast the numbers would appear to be a blur and I could never see a number long enough to read it. I'm assuming the problem with delay is that is uses the same timer that micros() does, thus screwing up the counting?