Hi, thanks for the feedback.

I was not suggesting/saying all the buildings were unsquared. There is one, so therefor my advise. 

Checking a few other changesets done by you i see buildings are squared, so i guess i just stumbled upon an exception.

As to the overlapping buildings: this does happen more often though. See eg changeset https://osmcha.org/changesets/154040205

I guess it is a bit hard to see visually in iD Editor. I am using JOSM, that contains validation tools that flags these issues.

iD Editor suggests to add a layer in case one feature overlaps another. That makes sense when eg a highway overruns a waterway. The highway should get a layer tag (and a bridge tag).

But for buildings that is not the case, buildings hardly ever overlap each other. So the suggestion iD Editor gives is misleading. "Repositioning" should be happening here.

Regards, martien