Can't Isolate Eyeball

I am having an issue following the cutting up the second parts tutorial with my character. Specifically I am trying to highlight the EYEBALL of my character. I cut out the eyelid section (Whole eye and face color) but when I tried to cut out the eyewhite, by using the marquee as the tutorial said, it would not select it. It would select the surrounding eye, or just the pupil, not the eye white. Could someone help me out.

PS. Before I started cutting up the character I grouped all the parts. Then cut the main parts without cutting from the main template. ???

Hi! Please specify the name of the tutorial you are following.
You can include a screen capture to display your issue if you like.