One eye moves more than the other

Hello,
Apologies if this has been brought up before. I'm pretty new to Character Animator and am having issues with movement for one eye. Maybe my google-fu isn't strong enough, but I wasn't able to find a solution to my problem. 
I was testing the range of the pupil movement with the keyboard input and noticed that when I press the arrow keys to look around, the (character's) left eye moves as expected, but the right eye barely moves down or to his left. Looking to his left isn't as big of a deal since the pupil is already pretty close to the inside of the eye, but looking down is extremely awkward. I tried adding the Pupil Range tags on both eyes. When I do this, the right eye is able to look left, but other than that, both eyes barely move. I've checked over and over again, and as far as I can tell, everything appears to be tagged correctly. Please help.

Thanks in advance!