Well, we're back to being off-topic, but since this question comes up ALL the time, here's the explanation:
Matt, the Looney Tunes shorts had the benefit of having a "home" on television, a program that we could list the DVD releases under at our site. These and other shorts (like Little Rascals, Popeye and others) all ended up being shown on television in regular, nationally broadcast or nationally syndicated TV programs that could be found on a given channel on a regularly scheduled basis; therefore we cover the DVD releases of material seen in those programs. Actually, there are a TON of shows we could have listed the Looney Tunes shorts under...go to our site and search on "Bugs" in the show search field sometime, and you'll see what I mean. We "picked" The Bugs Bunny/Looney Tunes Comedy Hour as our show of choice to list the DVD releases with, but we conceivably could have picked any of the regular TV shows the shorts aired under.
However, The Three Stooges have NEVER had the benefit of a regular, nationally broadcast or nationally syndicated TV program that could be found on a given channel on a regularly scheduled basis. All TV appearances, ever, of those shorts have been on an ad hoc basis, with a station deciding to run the shorts to fill in a blank time period (often on a one-off basis), or even just to fill in the gap after a "late late show" movie that didn't end precisely on the hour. Or maybe to have a "marathon" of their shorts run in place of the early show on a weekend day, or whatever. The only "television series" with the Stooges was their animated cartoons, a heading which the live-action film shorts obviously do not fall under. So we literally have no "home" for those Three Stooges shorts at TVShowsOnDVD.com!