No. Please have a look here: https://www.tim-online.nrw.de/tim-online2/ This is the official "Liegenschaftskataster" of "Land NRW". What's in there, is official and the 'de facto'. As you can see, OSM and NRW Atlas are identical, so we haven't made an error here in the first place. The bulding you markered is not Michaelstraße 1 in our data, it is Weisertrift 1 in our data. Same goes for number 2, also not Michaelstraße, but Weisertrift. So you made wrong assumptions in the first place.
Number 2A is only the "Integrative Kindertagesstätte Knirpsenland", which is again correctly mapped in OSM according to NRW Atlas. I had a look at Google StreetView (not allowed for us, but just to quickly double-check real photography) and you can clearly see the house number on the kindergarten. So number 2, which you want us tu change to 2a, can't even be number 2a. I also see the number on StreetView. No errors here!