Vclaw
2
I don’t think you are doing anything wrong, your edits look fine.
I think it is just the Noname layer not updating. I’m not sure how often it actually updates, but I have noticed it being weeks or months out of date before.
There are a few other no name layers you could try, eg Yet another validation tool for osm data. For example that area: http://beta.letuffe.org/?zoom=15&lat=51.30538&lon=-0.76638&layers=B0000TFFFFFFFFFFFFFFF It seems to be updated fairly often, usually within a day or two.
You could also try the services for comparing to OS OpenData Locator names. They can be useful for finding missing streetnames, also usually updated within a couple of days. eg that area: http://oscompare.raggedred.net/?zoom=14&lat=51.30372&lon=-0.76639&layers=B000TFF