Thank you for the link.

Interestingly, the first method (View/Uncheck Show in Groups) worked on 2 of my three e-folders. However on one folder, despite being unchecked, the grouping by time returned after restarting Outlook. However, the second method (View Settings/Group by none) seems to have worked permanently.

A second for my personal pet peeve....
I just updated from Office 2007 to 2010 and find it frustrating that the menu is rearranged such that I'm forced to relearn what I already knew.

Anyway, thanks again for the link.