Chicks can take a little while after hatch to get their legs under them, how long has it been since it hatched? Does it look like unabsorbed yolk on its belly or just a bit of chord left?
Not fluffing egg may be because either it hasn't been long enough (high humidity in the incubator slows them from drying) or it may be a sticky chick.
For its legs, do they look normal? Any splaying or curled toes? Any signs of slipped tendon?