This is the first time I've heard of "clown labs".
The one with the bent tail will not get better as time goes on. Reasons for the bent tail can include being an inbred defect or damage to the fry while in or being stripped from the mothers mouth. If it becomes a prevalent problem, I'd lean towards trying to find some less-related fish to introduce if you want to keep a breeding group.
Congrats on the fry. 
Yeah, that seems to be the common name for them, although I don't really see why. I will have to keep my eyes open for another male to purchase, so inbreeding is not a problem. I lost my very nicely marked male. The male I have left has very wide markings instead of the typical thin stripes and it looks like most of his fry have the wider markings as well. I will dispatch the bent tail one while the kids are at school this morning. The other four already seem to have it in their heads to torment him, so there is no use prolonging it I suppose. Reminds me of a little puffer fish with his tail like that and how he swims.
When I looked on Amazon and asked on here a year ago there weren't any good options like that breeding box, so I am excited it is good to use. Everyone just told me "get more tanks". I am building three more chicken coops though, so I guess that shows where my priorities are right now, hah.

Oh, and what should I feed the fry and how often?
On hand I have:
Frozen Daphnia
Spirulina Flakes from Blue Fish
NLS TheraA .5mm sinking
NLS Cichlid 1mm sinking
Hikari Micro Pellets Semi Floating