If you need to import pending orders only, DO THIS

Well, myself, I cannot test the module and order import when it is importing orders of all status and starting from the very beginning of the business.
So, all I needed was importing newly placed orders of status PENDING only. Here's what you have to edit:

open sale.py with IDLE editor and find the line that says :

if ctx.get('last_external_id', False):
                ids_or_filter[0]['increment_id'] = {'gt': ctx['last_external_id']}

and then comment it out writing a # at the beginning of the line

then, edit the line that says: ids_or_filter = [{'store_id': {'eq': magento_storeview_id}}]
to be: ids_or_filter = [{'store_id': {'eq': magento_storeview_id}, 'increment_id': {'gt': ctx.get('last_external_id', 0)},'status':'pending'}]

save, restart server and log back in.

in fact, all you did with this edit is add a filter to the orders list called from magento, plenty of filters you can use too depending on your needs.
peace.