@paul_t_allen, I can’t see your activities to check but I’m fairly sure this will be because Camden is ‘nested’ in another city - ‘Greater London,’.
When there are multiple instances of a particular street name appearing in different London Boroughs you need to run all of those individual instances to complete that street name for ‘Greater London’ but running it in Camden will complete Camden’s version.
So when you see a street duplicated in your completed street list for an activity it means that that street is unique to the Borough so you have completed both the Borough verion and the Greater London version ( as they are the same thing).
If a street appears only once in your completed list, it is because although you have completed that street in Camden there are other streets with the same name elsewhere in Greater London which you haven’t completed so you don’t get the credit for completing the Greater London version.
This also affects the ‘completed street’ count for any given activity. If you click on completed streets for an activity and count the unique street names listed, you’ll see it’s more than the number displayed on the completed tab as the number displayed is a count of only the streets that were completed for both the nested and parent cities.
I’m not sure if the above affects all nested/parent cities as @JamesChevalier was trying to fix this last year:
so maybe London got missed.