1. There shouldnt be any deer hair to the left of the arrow.
From the point of the hook back should just be your tailing materials. All the deer hair should start at the point and move forward to the eye.
2. The hair is not trimmed symmetrical to the center line of the hook. Especially the diving collar.
My guess from what I can tell in the pics,this why its roiling on you.
Edit: Ill chime in on what others mentioned. Yes they tend to work better trimmed smaller/narrower.
What I do to make sure its symmetrical and balanced is to turn the fly upside down holding it in your hand
and take a DOUBLE EDGED razor blade and shave the belly straight back from the eye to the back as close to the hook shank as you can with out cutting your thread wraps.
Now take your scissors and cut an arrow shape front to back making sure you have the same amount of hair on each side of the hook shank..this 1st should only be 1/8 deep or less until you make sure the shape is prefect. Now take some curved scissors and follow that cut as a guide around the rest of the bug.
Some guys can or freehand the whole thing with a double edge razor blade.
Yours ago I used to make a template out of poster board.
Just cut out you basic popper or diver head shape lay it flat on your trimmed belly and trim away.