Ya' ll ain' t a holdin' your mouth right.

I' ve used Super Glue exclusively for feathers on carbon shafts and have not had a problem at all. I' ve never had one come loose, even after going completely through a rag target.
I wonder if maybe the gel doesn' t hold quite as well. I use the regular stuff. I like the way it strips off easily when I' m ready to refletch also.