Reports work fine for me .. Just try to refresh the page from time to time . or check the 30 days reports (daily) : it give anticipated stats than the resumed one.
I check the daily all the time & look at the channels. OK, it must be just my acct. then. Well, not all the time just two times a day.
thats what happens if you look at your stats too many times.i hardly look at my stats once a day, sometimes once in every few days and they all look just fine to me