The sword is simply flipped the other way.
The second image is with old-animations and the right way while the third with sword-blocking isn't.



I'd like to get this fixed because old-animations and sword-blocking work tremendously well together and i use them every day.
The only thing is obviously this. I'm playing on 1.16.5 and i hope for a fix even tho the version is abandoned. Thanks for the attention.

Where did you get the old animations mod from?

Fixed in 2.0.0 :)