Yeah this one was baffling, especially so because we experienced different results with the same file 
I’m thinking it could be something related to this, but the github link in the post doesn’t work, so I’m not sure what exactly that issue was… I still would have thought the elemAssoc/famAssoc would have been built in the order of the input parameter names. 
I figured the dictionary method would avoid the parameters going out of that order, because the dictionary maps the parameter name to the parameter element.
Glad its finally working!