I just made an expensive mistake!

Had the driveshaft shortened too much. I made 2 marks on the shaft because the first time I marked it I realized the yoke was only partially inserted. Inserted it fully and made a second mark. Then later when I was making the notes on the shaft with my sharpie I scribbled out the second mark. So I had them shorten it based on the yoke barely being inserted.

I had it completely turned around in my head. Should have scratched out the first mark while I was under the car!
Wasted $200 on making a driveshaft I can't use for anything.
The safer thing would have been to measure from the output seal to the axle yoke like I needed an entirely new shaft. Then there couldn't have been any confusion.