Accessory Fitting tool inconsistent with realistic results

I noticed the accessory fitting tool is not fully accurate and there is some issues that are present making troubleshooting shoes the equivalent of going through a maze

For example in the walk animation the heels don’t clip however the heels move for some reason despite the weights being fully red???
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On studio test (putting heels on startercharacter the heels clip on the soles and the side of the shoe a bit
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Expected behavior

i expect the same results from wearing the shoes myself personally and the accessory fitting tool

thought this didnt post because it didnt redirect me to the post originally, however theres more information about the cause of this issue here