Hi , 

Thank you for bringing this to our notice. The editor has made the changes based on the information provided on the wiki regarding the highway=residential tags. 
"Roads carrying primarily through traffic, or non-residential traffic, should instead be tagged with another highway tag (e.g. unclassified, tertiary) as appropriate (see highways). Roads to individual dwellings would normally be tagged as highway=service (and likely service=driveway)."
However, considering the nature of the entities the segment could have been retained as residential. Hence as per your suggestion, I have made the necessary changes. Your feedback is highly valued.

Regards,
silakshm