Hi aMaca,
Thank you for your post, and welcome to the community forum!
I understand that you are checking if there are other ways or steps in Packing slips and receive items. I appreciate that you have taken the steps that you are already taking. By displaying back-ordered items on packing slips, we recognize the significance of this function for your business. Please be assured that our developer's team has been monitoring this and will consider adding it to the product roadmap based on the feature request.
Also, in running a report of received items for the day, you may check out this helpful article it will show the steps and workarounds to print all required packing slips.
Feel free to post if you still need further assistance.
Cheers,
Jem