Hi DoubleGobble00,
Have you tried to set the sensitivity down a notch? I do it if I scan in shallow water and that helped so far on my 981.
For the dark right side: If it only shows while you are sitting on the right side of your boat I think you already have the reason figured out. The question is what is more important to you. Clear picture when fishing or when driving?
The last picture looks a bit grainy to me. Have you turned on the sharpness in this picture? I would turn it off, 'cause the pictures aren't very detailed when it is turned on.
Regards / Harry