Issues in tutorial animations

I am following the tutorials here A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums2-_Project_Creation_and_FBX_Download

And I have notices that the left shoulder in the animations from the wiki is a bit off.

This is taken from the ThirdPersonIdle animation.

57779-anierror.png

Is that normal and something I should Ignore or is there an easy way to fix it ?

3rd Person Game with Blueprints - 17 - Skeleton Retargeting and Montage Setup

This video shows how to fix it.

Basically retargeting the animation to follow the skeleton fixes it.