something is wrong ... ideas!

Just had the check hatch almost 2 days ago now i had to help assist it in hatching but my question is its still not standing upright and it waddles/lays down to get around im pretty sure it doesnt have splayed legs. so what im wondering what could be wrong? im thinking weak legs due to the fact it needed help to hatch but ive also heard about it have a sperated tendon so the leg wont drop down?does that mean the leg would be hard to pull down or? im still very new to the chicken world so if someone could please help thanks!