Yes, whether filled now or later, there should be ten individual diaries plus a gouup diary. My point is that if and when discovered, we may get additional insight into the dynamics both inside and outside the last camp. It is also a prime opportunity for a DPI hoax.
It seemed customary to complete diaries after the daily duties were done. I wonder whether the combat leaflet, which was a nice but not necessary bit of composition, was written after the meal and before the diaries, or if it was a single person's effort and written not all at once, nor all on the same day. I think it had to be one person's work otherwise the humor would be spoiled if each contributor pre- read the unfinished work.
My point is that the diaries were not written to when the group left the tent and the missing diaries were not itemized with personal effects. This may help fix the desertion of the tent to a certain time frame. It begs the question of how the diaries were physically kept. I, for one would not grab a diary when I could grab a knife. If however, the personal diaries were routinely kept on the person, then they could have gone to the forest, be at the morgue, found by Mansi, or be in the hands of some rescuer/collector. Everything has to be somewhere.