This is my first time cloning and I wanted to know if it was normal for the roots of my clones to be growing outside the rock wool cube and if not, I would like suggestions on what to do.
If there are roots inside of the rock wool to you should plant it, but if there aren't you should leave it under the dome (if you have one) until there are then plant it.
those roots are growing out of the stem because of excessive moisture. plant them asap, imo, and make sure those roots are below the surface of your medium. jm$.02