North Kensington Misplaced on Google Maps

I spent today in west London and got a little confused when finding my way around.  I have just discovered why:  Google Maps, which I used to plan my route beforehand, incorrectly shows North Kensington about 3km southeast from where it should be (in the same place that it --correctly-- shows South Kensington).  Fortunately the pocket street map I took with me did not contain this error.