So you can easily modify postlist.php ...
Just replace
ORDER BY E_Location
with
ORDER BY E_Time
You don't need to sort by date, because you're showing one date at a time anyway.
After the above, you may also play around with the next 4 lines which contain $Evnt in order to modify the events display, and not to show the location as the first thing in the string. Or whatever your preference.
Max
