I'm using Easy Populate 4.0.30 - Beta 06-27-2015

I define the following fields in admin setting in Easy Populate:
User Defined Products Fields: products_ordered,products_length,products_width,products_height,products_ready_t o_ship

I exported Complete Products (with Metatags) then removed all but either id or model forgot which is required and the defined above and imported back with the defined fields populated as I needed them to be. That's all I did which I believe reset the quantity ordered as I described.