Cleaning up the extractor function

[colleenskemp]

Fixing the extractor function will support the models that need to be updated.

[denised]

@colleenskemp I'm not sure this is true, or if it is true that it is a good time trade-off. When I have difficulties using the extractor functions, the issues are often in the Excel, not the extractor, and figuring them out is the hard work, and would have to be done anyway. When I do find something that I can improve in the extractor, I make that change at that time. There is no current list of extractor issues that will just make things better that I am aware of. I suggest closing this issue (unless there are some specific issues to bring up).