i've been trying to weight paint this simple model for a while now because the automatic weights didnt work that well. The images below indicate the places where it went wrong, even though i have duplicated the arms and legs and the opposite limbs work perfectly, those limbs are completely red. As you can see when i weight paint i cant select some vertices without fading into opposite one. If you dont understand my point, heres the link for the blend file:
https://drive.google.com/open?id=11rx-Kgh_FhNLNz8_GN3mrIYPPevsmrno
below are the pictures