So first off I'm new to blender and I'm following a video on how to model a female anime body, all was going great, but when I tried to use the knife tool I started having problems.
1st off the knife tool doesn't clip to the corners for some reason (or to the lines I want them to clip to).
2nd When I select where I want to cut it, it adds an extra cutting point. (it would add a 3rd point alot higher, making an almost finished triangle or an A without the horizontal line in the middle).

https://youtu.be/qM8ZKrnbfwA

https://mega.nz/file/ig5CEawI#rrSSvu9bBXjJDcEVydpAe5O1HnXx1UgIfGuR85VywNo

I can't reproduce the extra cut, but you can see that it makes the cut alot higher than where I selected. (Or it still does but doesn't show?)
Btw if I put the cutting point under the corner it does the exact same.

I use Blender version 3.5.1 from Steam.

Am I doing something wrong, is my file corrupted or is the tool just bugged?