Shellac Nails Chipping

Cnd shellac after 4 weeks all 10 nails had no chipping or peeling, only seven days after gel/shellac application, all nails are already, uneven nails shellac chipping after four days yelp. Uneven nails shellac chipping after four days yelp. Cnd shellac after 4 weeks all 10 nails had no chipping or peeling.