So, if I have y axis as forward it would cause a problem? If that’s the case, then I think that might be the reason for the issue I’m having. Thank you very much for your response. I still haven’t had a chance to rebuild the skeleton. I think I originally built it and then exported it from Blender as y axis as forward, so I’m pretty confident that that’s the issue. I’m not sure that these pictures are helpful or what you were looking to see so let me know if I should send more pictures, but here is a picture of the knee joint orientation before and after plugging in the IKTwoBone to the graph:
Unrigged^
Rigged^
Something definitely seems weird, but I don’t know enough about rigging to have a clue what it is. I’ll try rebuilding and reexporting the skeleton as x axis forward and see if that works, and I’ll get back to you as soon as I find out. Thank you so much for your help.