questions about emerald crabs,chromis and damsels?

[reefnut]

My first tank 33 gal 30 pounds lr,2" of ls.Now my citters 1 blue green chromis,1domino damsel,1 emerald crab and 1 peppermint shrimp.My questions are is a dominos damsel and a chromis good tankmates?Mine always seem to be hassling each other.My second question is my emerald just molted and i was wondering if they always come out missing one claw and the othere fives times bigger then the one on the empty molt?