I once brought an antenna to Cincinnati with me when I had to work an event at Princeton H.S. and the Bengals were playing at the time. As I remember, 9 did not come in at all, 12 was much more hit and miss than I expected (that being the channel carrying the game), and I remember getting 19, 25, 48 and 64 anyway. Don't think I ever checked 5.
None of the Dayton stations were present at all. So maybe my expectations of getting all of them in Mason with my antenna are optimistic. I only live about 15 miles from downtown Columbus and have the most basic of digital antennas because that is all I need at this distance.
Was it a UHF-only antenna? You shouldn't have had any trouble at all with 5, 9 or 12 that close in.
When I was in Cincinnati over the summer, a pretty basic indoor antenna gave me no trouble with all the locals plus a few of the Dayton signals (2 and 26 especially well) from one of the downtown hotels.