Abnormal fingers and repeated limbs in animation can typically be corrected by adjusting the rigging and weight painting of the character's mesh in 3D modeling software. It is a complex process that involves making sure the mesh deforms properly, and that the bones of the rig are properly aligned and controlling the right parts of the mesh. If you have access to 3D animation software and have experience with rigging and weight painting, you can try to fix the issue yourself. If not, consider reaching out to a professional animator for assistance, blur haze, blur haze