The initial aim was to produce ten points, using the familiar symbolism of the Ten Commandments. A memorable numbered declaration could draw attention and help people remember its ideas. The account here has eight points surviving from that intended ten. Churchill and the delegations debated the proposals and edited their wording before agreement.
Chapter · 34:06-35:13
Ten-point symbolism became an eight-point charter
Negotiators wanted ten memorable principles but reduced the declaration to eight as Churchill and the delegations revised the wording.