I have the situation here that the Statistics are not displaying correctly.
If you view weeks 1, 2, 3 or 4, the statistics appear on the screen.
If you then choose to display 2 or 3 months, the system reports "There is no available data for that combination of course and time period"
If you then choose to display 5 months or more, the system reports that there are statistics, however anything for weeks 1,2,3 and 4 all display as zero.
If I run a SQL enquiry on the log files this shows that the data is in fact in the standard logfile.