aequator
First: I am a user from Germany and I never was here. At that time I fixed intersections of multipolygon members all over the planet, which are a problem.  So I just left a note about my doubt and didn't correct the tagging nor the position of these edits. 
But when I compare e.g. Bing Imagery and the edits made, I still see a lot of differences. 
IMHO it would be a good idea to contact the initial editor https://www.openstreetmap.org/user/alecdhuse
Cheers Carsten