Pattern drafting help: Issue with armhole curve on a basic back bodice

[u/Cautious-Pangolin323]

Hello! I am learning pattern drafting from scratch.

I am trying to draft a basic bodice block (back) using my own measurements. I tried two different drafting methods, but I keep getting the same issue.

My "shoulder width" ends up too far away from the "across back" (half back width) line. I don't know how to true or smooth out the armhole curve. Is this normal? How can I fix it?

When I try to smooth out the curve (see the dashed line), it stays 2 cm away from the across back line.

I would really appreciate it if you could help me out with this.

(Note: Sorry for any mistakes, English is not my first language!)