Weight Map Symmetry

Faux2D

I keep having issues with the Weight Map Symmetry tool: Weight Brush tool -> Right Click -> Weight Editing -> Weight Map Symmetry

My figure has symmetrical gemometry. The Skeletal setup is also symmetrical. I have mirrored one side to the other and memorized the figure's rigging.

When I use the tool and choose the "Entire Figure" option it copies some weight maps to wrong bones. I have tried renaming the bones and reparenting the bones but still nothing.

Anyone know of a solution to this?