Well, regarding the second problem, instead of clicking on the eye, look in the dropdown menu above the material settings for the iris material zone. This will allow you to change the iris colour as you desire. The reaosn it's not working is because V4 has another zone overlaying the iris and pupil areas, and if you try to click on the eye, it will automatically choose this one rather than any of the zones lurking behind.

The first one sounds like there's some discrepancy between the eyes' position in the pose file you're loading and in your personal INJ. Whilst I'm not sure, it's likely that all you can do here is readjust by hand until they're back in the right place, and then resave the pose.

JonTheCelt