My bad, it came from someone who downloaded through a itch key.
I had a bad experience in the past on another store where people were activating my games for free through a glitch, so I really scared off when I saw a number of downloads higher than the ones marked in the panel where I can see people who have purchased it. The maths weren't right.
Anyway, it would be good if we had an easier panel to check the track of everything IMO. I had to go on the Distribute tab and look if someone I gave a key had downloaded it. I had forgotten about this detail.
My sincere apologies again,