I could be wrong, but I think the November calendar had something to do with this.
Election Day fell, of course, during the first week of November. Wheel was pre-empted in many markets that day, and the possibility existed for even more pre-emptions if the 2000 debacle happened again.
Thanksgiving was the fourth week of November. Traditionally, Thanksgiving night and the Friday following Thanksgiving are two of the lowest rated nights for TV of the year. Plus, football games could result in pre-emptions for Wheel's markets...again.
Road shows are sweeps shows. Given the time, expense, and pride Wheel puts into its "on the road" productions, they probably did not want to "waste" these shows on days when pre-emptions were very likely to occur. That left only two full pre-emption weeks free in November sweeps, so they chose to only air 2 weeks of the Philadelphia shows, and hold the 3rd week over until February. Indeed, we'll be seeing 4 full weeks of road shows this month: 1 in Philly, and 3 in Vegas. (I was fortunate enough to attend week 2).
Like I said, this is all speculation on my part. But, it's as good as an explanation as I could figure.
-Jay