First off, it is typically against forum etiquette to double post, and I believe against the rules here...... Since your coral isn't sick, I'll answer this post.
No, gel super glue typically doesn't work with soft corals like leathers & mushrooms. When disturbed, they tend to ooze a protective slime that prevents the glue from sticking. You can either use a rubber band or fishing line to tie them to the rock, or I've even heard of people running the fishing line through the base of the coral with a large gauge mattress needle and then tie it to the rock..... never tried that one myself. Usually takes a week or two for the coral to take hold, then remove the tie down material.
Wanna calculate the cost of that new reef tank?? Take your worst nightmare, double it, and you're halfway there.