actually Fox sticks with its reality shows better than a lot of other networks have. Forever Eden was a disaster and didn't even have a "season" to let end because it was formatted to run indefinitely, yet the ratings showed that wasn't going to happen.
ABC pulled the second season of The Mole for about a year after 2 or 3 episodes had aired. The Family (was this also ABC? I think so) got shelved for several months after just a couple of episodes had aired, and was later brought back with a "catch-up" premier. NBC had yanked The Restaurant 2 from last spring's schedule, only to bring it back in the summer and then admit that they really botched that scheduling. CBS has jerked around airing dates for TAR several times, saying that a season was going to air in the spring but then not airing it until the summer (a year ago) and now saying that TAR 6 was going to be on the fall schedule, but waffling about that start date too. I'd say that FOX is at least as consistent (if not moreso) than other network with their scheduling of reality tv shows. Of course I've recapped only the worst of reality tv shows, so I've seen plenty of the FOX series.