I’m sorry for your experience with Maproulette, unfortunately not checking mapping and not communicating with the original mapper is typical for Maproulette users.
Would you be able to link to or upload an image of these buildings? I’m curious whether these are best described as physically two distinct buildings, or could it be thought of as one building with commercial use on one level and residential uses above? (Unfortunately OSM doesn’t seem to have a good way to tag multi-use buildings like that.)
Are the residential entrances at the back, from the mapped footway? Maybe an option could be to map the residential entrances and tag the address there?