Why dont Google Adsense Earnings add up?

I was just looking at my Adsense earnings and I found that the sum total of each day does not add up to the reported total.

This has happened in the last two months, we are only talking a few cents, but I was wondering if other people have had the same issue and how big the problem gets?

Now it may be a rounding issue, but I couldn\’t find an answer on the Google Adsense help as it was \”Down\” with a problem.

Have you had the same experience, my earnings are not large, so I intersted to hear from anyone who has large earnings and has the same issue.

Cheers

Steven