The Flame Bringer's sprite

Has anyone noticed that the flame bringer/arch vile always seems to float up and down during its animation of attack and movement? Is this normal?
I'm using Freedoom 0.9

Yes, he's a placeholder. He also has no resurrection frames.

uric has been working on and off on making a new one. if he is unable to finish it for some reason i will continue where he lefts off