I hate to say this almost, but you know what? Some days suck, and other days kick ass.. and when they are one day after the other, you can have stats look like that when there is absolutely nothing wrong. It happens and it's no fun, and it makes you crazy, lol.. But it *does* happen sometimes.
Do your stats trend more towards the 15 or the 0? Somewhere in the middle?
Stuff like this is why I always try to look on a weekly, bi-weekly or monthly basis instead of hourly or daily. Helps with the sanity, lol.
