Hi, I took a little time sorting out several problems here, unfortunately, you've now introduced several more problems/anomalies. I list the details below, could you make amendments, please?

You now have a building (Way: 168987424) within another building (Way: 1171670872). 

A garden is tagged as a building, building:levels=1 and layer=1 (a garden is usually implied (with no tag necessary) as level=0, and a garden is not a building).

There are now four features, 
(Node: Sun & Beauty Studios (10885796414) 
Way: 168987424 
Node: 10889513964 
Way: 1171495810
all tagged with the address of 147 High Street. It's OSM practice to tag one feature as one OSM element it's a good practice principle. It means one on-the-ground real world feature should be mapped with only one OSM element.

Regards Bernard.