Looks like it is upside down at a minimum.
View larry potterfield.
https://m.youtube.com/watch?v=dmUo7lvmU1E
OMG!! The video explains it! It's not upside down, he cut the stock wrong. He didn't make the cut perpendicular to the line of sight! Or as BigBoxa said, the angle of the butt to the comb isn't 45 degrees.
Right. And then he extended the stock angles onto the recoil pad. And installed it 180degrees off in the z axis.
2/3rd of the way to your swivel would be perpendicular from what I see. And that's cutting at the very edge of the upper material.
Im guessing you lose another inch or so overall. But less on the lop. Because you're only moving one end of the cut.
Yeah, that doesn't look too good! I hope you get it worked out!