Beginner needing help with bones

Hi, I am doing a school project to create an animation. I have run into a problem of when am to move 1 leg of my elephant model both legs move and because I am a complete noob at using the full extent of blender I was hoping for some assistant. Another problem is that the bones in the second leg do not move around the model as well.

I thought it has to do with me doing the bones incorrectly or due to me mirroring the elephant model.

Here are some pictures of my problems.


Please upload a .blend because with bones anything can go wrong :wink: