In case you also have a hand on this point, when you do a search for “saint-pierre-des-nids” from the observations page, the search uses the spatial extent of the commune (bbox), not the precise perimeter.
However, for other places, the precise perimeter is used.
The Location box on the Explore page uses a list of locations from Google, which are often different than the iNat places. You can select iNat places instead by clicking the Filters button and entering the name in the Place field.