SmartCopy uses the Google API to attempt to 'expand/confirm' the location information found on the record (web page) being examined.
However, since many records use abbreviations or 'incomplete' locations -- let alone the issues of historical locations name versus current/modern location names, that "lookup" may not yield useful results.
It can often be WILDLY wrong.
So one ought to always at least quickly expand the details and scan the locations to ensure 'bad locations' don't get added. If you don't want to type in the corrections within the SmartCopy panel, at least "close" the details so that only the 'Place' field contains the original text, rather than have 'bad locations' added.
SmartCopy does a few things to help, but diligence is necessary.
This discussion is intended as a place to point out some examples to watch out for; some may lead to improvements in SmartCopy, but the more examples I see, the more quickly I personally might "spot" them when doing the "quick scan".