Hi again,
I told you that, but still, to be sure I addressed all change sets feedback:
mapper worked in POL roads challenge, then jumped to CAN to fix small error in and upload all edits in big change set. We retrained our team to be careful for limited change sets reflecting logical edits grouped and we will improve for the future. Thank you once again, feel free to contact us and me directly if you see anything, we can do better for OSM. More than happy to learn from you, regards! 
Domi