Now I know why reading the manual is important

[Nightblade]

While mentionning the manual, there is this question that i always forgot to post here :

As usually between 2 PBEM games there could be easily 6 or way more months, i tend to fear i could have forgotten a bit of the process about the exact files to provide, and so re-read the PBEM explanations from the manual to refresh my memory each time before i play a PBEM with someone.

And everytime i am a bit puzzled by this part on the manual, and apparently my opponents that usually play PBEM as much as me too.
about the secured PBEM games :

This example shows the files for the second PBEM save slot being selected ( remember, the slots are numbered from (0) ZERO and not (1)ONE.

And the screenshot shows 2 files that are highlighted, so i suppose those are the ones used for the PBEM

But unfortunately, few paragraph after that, i read this :

In a remote game, player 1 now sends the 3 zipped up files to player 2.

There we are usually a bit lost, as in the example there were only 2 files highlighted, and nowhere else in the explanation there is a mention of that 3rd file.

And few lines after :

Player 2 now exits to windows, and zips up the 2 files for this game and transmits to player 1.

I suppose the "3" is a typo, but to prevent any problems in the case the typo was in fact the "2" , we always sent the 2 files + the PBEMRegistry.dat at every turn of our PBEM games(as i imagine if there is indeed a 3rd file to send, it must have been this one)

So is the "3" in the manual a typo, or just the explanation being a bit confusing ?