ts-down sorts between deadline-down and scheduled-down

[Samuel Wales <samologist@gmail.com>]

if i put ts-down before deadline-down and scheduled-down, it shows up
after deadline and before scheduled.

((agenda habit-down time-up tsia-down ts-down deadline-down
scheduled-down category-up user-defined-up)
 (todo category-up user-defined-up)
 (tags category-up user-defined-up)
 (search category-up user-defined-up))

what i expect is before deadline.

i am getting this in vanilla bugfix and main with my .emacs [canot do
ecm atm].  vanilla 9.4 maint works correctly.