Jan-Pieter Zoutewelle
I actually live here, and the address has changed from just having 1 registered house to having 4 different addresses (4, 4a, 4b, 4c).

No idea how to fix this though, GeoNames doesn't seem to offer easy adjustment. It could also be a feature, anything with additions to the number (abcde) gets 'mapped' to the base location (4), but though this works on our address I don't think this works for other locations.