Yep, but they shouldn't. 75 is the ref and doesn't need to be duplicated in the name tag; a rural A-road is just tagged "ref=A3400" and not "name=A3400 road". There's been quite a lot of discussion of this on the various mailing lists, community.osm.org, Nominatim issue tracker etc. and it utterly fouls up any attempt to do anything with the data.