Why won't the Finder sort when clicking on the column headers in this different list view? As pictured this new list view has the column headers that are un-clickable, so one can't sort by clicking on the column headers.

Why is the Finder doing this and how do I get it back to the way it is in the deactivated window. 

Any suggestions?
You could also select View > Arrange By > None, press ⌃⌘0, or change the arrange mode from the pop-up menu on the toolbar.



See also Finder: Difference of "Sort by", "Clean Up By" and "Arrange by" - Ask Different.