If you had traffic analysis turned on since before today then there's something strange going on with the graphs as they should look more like this:
Notice the yellow highlighted areas where it shows total usage and then breaks it down into sent and received or upload and download. Wonder if your dashboard is just having a momentary issue, it happens from time to time.
Edit: Ah, I see, you want the upload and download shown separately in the graphs... Don't think that is currently possible.