The others that hatched look like pure ABs for sure. silver grey looking. No worries! This little chick has some great coloring, I'll be hoping for a hen :)
I had one hatch with splayed leg too, maybe the sitting in the heat had something to do with it. Well I have a hen that looks more porcelain and I'm thinking the coloring of that chick may end up being like her and not full lavender. It wasn't until I posted a pic of her on here that someone...
I had 3 of mine hatch but I set 5. I think the lavender gene makes them harder to hatch, but I'm not sure. So my AB chicks are different colors, one black and white and dark grey and light grey. One has feathered legs!