Google Maps Location Sillyness

Google Maps has a funny idea of where things are.

If I view the 'my contributions' page it looks something like this

See that marker in the middle of the North Sea? And the photo on the left which says North Sea?

Now look at this image of Google Maps zoomed in to near Harwich

That's the same picture.

When I look at this on Panoramio it says the location is Harwich.

In fact it says "Photo taken in 13 Lower Marine Parade, Harwich CO12 3SS, UK

51° 54' 50.75" N  1° 18' 15.42" E"

Which is clearly not true but better than "North Sea".

I can't find any way of adding names of seas, bays or channels or of changing where this is, or how come Google Maps says its in the north sea but Panoramio says its in Harwich.