My 5yr old don't know when she pees or poops sometimes she says she can't feel it she has hyper mobile joints could they be caused by same thing?

If your child has : (1) never been able to control her bowels & bladder for 6 mos., (2)low muscle tone in her legs & (3) ⬇ed sensation in her lower body parts, an uncommon possible cause for all 3 is caudal regression syndrome, congenital malformations of the lower spinal cord, vertebrae & sacrum (the triangular pelvic bone of five fused vertebrae). See http://ghr.Nlm.Nih.Gov/condition/caudal-regression-syndrome.