Why does my extra body part appear on the characters back?

I made a script that causes a body part to appear on the players character once the button is clicked. The process in the script from start to finish is, to see who clicked the button, make the weld from the body part to the humanoid root part, then change the orientation and the position of the body part to the waist (The position is correct because i tested it on a dummy). Even with this order, the position of the body part is on the players back instead of the waist. Why does this happen and how can I fix it?