I really like the FPJ Octa Lune and am thinking of buying one, but I am a bit perplexed about the practicality of how the date/moon phase are set after watching this video (https://www.youtube.com/watch?v=AZzlvL2wuGw) starting at ~3:00.

It appears that turning the crown clockwise advances both the moon phase and the date display, but turning the crown counter-clockwise advances only the moon phase. So how do you correct the date display (to advance it one day) on months with <31 days? If you advance the date one day by turning the crown clockwise the moon phase also advances. So do you then have to advance the moon phase 28 days? That's how it appears in the video. If this is true, it makes no sense. It seems like the movement should have been designed so that turning the crown counter clockwise advances the date only rather than the moon phase only.

Or am I missing something?