Why do they swap hands?

Why do they swap hands?

Am I the only one that noticed that all of the weapon/item animations they swap hands in some of the animations?

 

http://lpc.opengameart.org/static/lpc-style-guide/_images/male_slash.png

 

Top 2 rows he is right-handed

Bottom 2 rows he is left-handed?

 

Just looks kind of odd to me :(