I need help with fixing the broken cres of my clothing mesh in simPE. Can anybody explain how to do this?

There are two skeletons. I tried getting rid of it through milkshape, but it wouldn't import. So, I have to do it through simPE. I discovered that there are 129 joints. I am  pretty sure that there are supposed to be 65. Which ones am I supposed to get rid of? I need to know so I don't mess it up worse.