Newbie needs help (mirror & other stuff)

http://juskalampela.com/blenderproblem.png

I’ve only used Blender for three days now, so I’ve ran into a couple of newbie problems. As you can see from the image, mirror modifier doesn’t work smoothly, there is a line crossing the the face from where it is mirrored.

Also, when I try to move iris closer to the eyeball, at certain point grabbing and scaling affects both iris & eyeball, even though I have only one of them selected. Any ideas why?

fixing the crease will require smoothing (W key —> smooth) the center edge. First, make sure “clipping, merge” are selected on the mirror modifier.

The second question sounds like you have proportional editing selected (O key is the toggle to turn on/ off) there is a little circle icon in the lower bar that will toggle as you press the O key.