Turning off symmetry in weight painting

I am trying to paint the weight of bones on my mesh, but when I paint one side, the other gets painted too. How do I turn off symmetry for weight painting? Also there is a problem with one leg on my mesh. When I try to paint weight on, it messes the mesh up really bad. This only happens with one leg. Here is a picture of before and after painting the leg.


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In weight paint mode, go to 'options
tab and uncheck ‘x mirror’


Mirror is unchecked, but the problem is still happening. I mirrored my mesh along the Y axis on accident when I was modeling the mesh, could that be an issue?

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actually im not sure which axis it is mirrored on, I get confused with that haha. But this the front view of my mesh.

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