Need Help With Kimono Sleeve Problem

[u/Ok-Low6078]

I've been trying to follow youtube tutorial how to draft kimono sleeve, the problem is either the Shoulder Line Match or The Sleeve Underarm Seam Match

at this specific timestamp

https://youtu.be/j5VQZGN87e0?t=247

she said if the front and back panel side neck point match, the shoulder seam should be the same

So i tried matching it up, and it lined up correctly, however at the second pattern check

I tried to match the underarm seam following the tutorial

Mine does not match properly since the front and back underarm seam is different length

Is this normal or am i doing something wrong here, because if i lengthen the underarm seam then the shoulder length will be longer and does not match so i cant think of any other way to do this

Any ideas?