Thanks for your patience. I’ve fixed the remaining issues, please check the links below to find the exact changes.

https://www.openstreetmap.org/changeset/140060429
> Restored shop=car_repair, deleted unnecessary area=yes

https://www.openstreetmap.org/changeset/140060458
> Restored building:levels=1, deleted unnecessary layer=1

https://www.openstreetmap.org/changeset/140060501
> Merged a common node between two buildings and a shop

You’re welcome to continue improving OpenStreetMap if you enjoy it. Please follow Wiki (https://wiki.openstreetmap.org/) guidelines and perhaps try a better editor (https://josm.openstreetmap.de/).