TL;DR: I thought the weapons were supposed to follow a set pattern of results and it seems like it doesn't?
The longer version: I'm pretty new into farming the materials for Artian weapons. My understanding was that once you made your first one, you 'locked in' to the seed and then followed a set pattern for the weapons crafted afterwards. I saved up enough to make a decent amount weapons; 25 made with 3 affinity parts, 15 with 3 attack parts. I make the weapons checking to see what rolls at what craft number and I was already saved to the seed as I tried to make 2 or 3 weapons when I first unlocked them. Craft number 32 should have given me a 2 sharpness + 3 attack roll on my Artian going 25 affinity and then 7 attack crafts. Coming back into the game, make the weapons again, and when I hit 32 going 25 affinity and 7 attack crafts like before, but the roll is something completely else. Going up to 40 in the same pattern and it's not there, so it wasn't me goofing on a miscount.
I thought I understood the system, but it turns out I don't. Can someone explain to me exactly how this damn thing works?