Well, you can just put the origin/center point a couple pixels to the left(about 4px as im seeing it).
Or take the whole sheet and move the character across all frames 4px to the right.
The thing is, i made this so long ago, i dont remember why i put it like that, but i think it was because the attack animation was too large for the canvas, so i moved the character a bit to the side. But it should be a really easy fix to just move the origin point a couple px to the left around which the sprite flips/rotates etc.
Ill take the time some day and redo the centering on the sprites just so its easier.