[O] ordering events by hour in the agenda

[Victor A . Stoichita]

Hi,

I need some help to understand the way the hour grid works in 
agenda displays. I read this page from the doc :

[1] 
http://orgmode.org/manual/Time_002dof_002dday-specifications.html

But my agenda doesn’t look like the examples there. Its timed 
events appear in seemingly random order and they are not reflected 
in the hourly grid when I display it.

Here’s a snippet from my weekly agenda without the grid:

--8<---------------cut here---------------start------------->8--- 
Monday     27 June 2016 W26 
 vic:        17:00...... Docteur Dupont vic:         9:00...... 
 Appeler Dupond 
Tuesday    28 June 2016 
 vic:        10:00...... Rencontrer Pierre vic: 
 14:00...... Voir Jacques vic:        14:00...... Rdv Paul?  vic: 
 12:00...... Visite Julie

--8<---------------cut here---------------end--------------->8---

Based on [1] I’d expect Appeler Dupond to appear before Docteur 
Dupont on Monday. There seems to be no logic in the order of the 
events on Tuesday either. All these events come from the same org 
file. None has a specific tag or something.

Here’s the same snippet with the hourly grid turned on:

--8<---------------cut here---------------start------------->8--- 
Monday     27 June 2016 W26 
 vic:        17:00...... Docteur Dupont vic:         9:00...... 
 Appeler Dupond 
             16:04...... 
             now - - - - - - - - - - - - - - - - - - - - - - - - - 
             20:00...... ---------------- 
             18:00...... ---------------- 
             16:00...... ---------------- 
             14:00...... ---------------- 
             12:00...... ---------------- 
             10:00...... ---------------- 
              8:00...... ---------------- 
Tuesday    28 June 2016 
 vic:        10:00...... Rencontrer Pierre vic: 
 14:00...... Voir Jacques vic:        14:00...... Rdv Paul?  vic: 
 12:00...... Visite Julie
 --8<---------------cut 
 here---------------end--------------->8---

Based on [1] I’d expect the two events at 9:00 and 17:00 on Monday 
to appear in the grid. I’d also expect the grid to progress from 
early at the top to late at the bottom. I’m not sure whether the 
line with "Now" should appear at the top (rather than at its place 
in the hour listing).

C-h v says that the value of org-agenda-time-grid is ((daily today 
require-timed) "----------------" (800 1000 1200 1400 1600 1800 
2000))
This is the default setting I think. I have not set any variable 
related to the time grid in my .emacs file.

Where else should I look to get the timed events arranged in their 
chrolonogical order?

I have Org-mode 8.3.4 with Emacs 24.5.1

Best regards,
Victor