License Report -> Daily Volume by Week for Last 4 weeks -> Displays NULL as one of the columns. What could be causing this?
Peak daily usage in last 30 days displays that we were below our license limit, however the graph displays we exceeded it at least 3 times in last 30 days.
I'm seeing the NULL column as well. According to another question I found from this time last year, it's due to a bug in their search that doesn't take into account the year change. I'm guessing the NULL column will eventually go away once we've got far enough into the new year.
http://answers.splunk.com/answers/71807/deployment-monitor-and-y2k13