Blender animations twisting bones and ghost bones

So I’m working with Blender for quite some time and you could say I’m not quite an expert yet but understand enough to know what went wrong. So when I import the model it says that I have bones that I previously deleted from Blender and yet still persist somewhere and cannot find them anywhere to my knowledge. So when I import the animations the model is twisted but also when I upload them with model it’ll only bring two animations. The “leap_right” and “t_pose.” I’ve been working on this for quite some time and nothing I do helps it.