Reset Sales Statistics To Last 30 Days

Normally when I log in to the admin area it show stats for the last 30 days which is great. Well I wanted to run some numbers from a few months ago and now it's stuck on only showing a certain date. In the past it would seem to fix itself and going back to the default past 30 days but it now it seems to be stuck on whatever dates I run. How do I get it back to "normal"?

This information is stored in session. So try to clear cookies in your browser or make a search with correct period. It should be saved then

Cookies must last a lot longer now as it always seemed to fix itself in a day or so before but this time I seemed to be locked into a session for a week. Clearing my cookies did make it go back to normal.