Problem with time span of weekly report (no replies)

Hi,

Im having troubles setting up a weekly report for a Homepage. It looks like the settings for the report are all okay, but when i receive the automated reports the time span of the visit summary is completely wrong.
The supposed timespan is one week from April 7th till April 13th (report is from April 14th) but my result looks like this:

The strange thing is, the report i get when I click "Send report now" has the right time span:


I did not change any settings and the rest of the report looks alright
Is this a bug or am I doing something wrong?