With the following:
(setq org-agenda-sorting-strategy '((agenda time-up deadline-down
scheduled-down habit-down priority-down category-keep)
(todo priority-down category-keep)
(tags priority-down category-keep)
(search category-keep)))
The `time-up` is correctly shown first;
Emacs : GNU Emacs 25.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.22.16)
of 2017-07-15
Package: Org-mode version 8.2.10 (release_8.2.10 @
/usr/share/emacs/25.2/lisp/org/)
Emacs : GNU Emacs 25.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.22.16)
of 2017-07-15
Package: Org-mode version 8.2.10 (release_8.2.10 @
/usr/share/emacs/25.2/lisp/org/)