are the scabs on their vents?? If the scab is not covering their vent and preventing them from passing soil then I would leave them alone - if you pick it off it may create a wound which the other chicks may peck at - those turn nasty very quick. If your worried you could put some olive oil on the scab to help stop feathers from getting stuck in it and pulling at the skin.
Different breeds will have slightly different spaces between their legs - you don't really have to worry at all if they are walking around normally, spraddle legs are when they look like theyve been ice skating and have fallen over - with one leg straight out each side , you can also get twisted hips - but this is where one leg sticks out straight behind or infront. If your worried a good way to tell if theyre allright is to pick them up with a finger undertheir head and another under their bum so their legs hang straight down under your hand and then gently lower them to the ground/ table and they will put their legs out to try and stand up, if they put their legs down straight and stand theyre fine.
Spraddle leg is very obvious - in that they wont stand up , they will sit on their bottoms with a leg out each side like theyre doing the splits.
The backyard chicken site is a great source of information :).