Hi, you mapped a few yards as buildings here. Note the direction in which shadows are cast and what is casting them. Using Bing as a supporting source in this area is very helpful; please read my project comments if you haven't already. 

You mapped a dupliacte footprint here, please modify features if you can tell what it represents rather than deleting and re-mapping. Do not apply layer tags to features to make overlap warnings go away, instead resolved the root cause of the problem.

Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/