I'm not on TDF, but I know it was mentioned in another thread and on ATC that most of those dates are dates that either LuPone, Stokes or both will be out of the show. Telecharge and LCT have that info on their websites. (They'll both be out for both shows this Saturday)
When I see the phrase "the ____ estate", I imagine a vast mansion in the country full of monocled men and high-collared women receiving letters about productions across the country and doing spit-takes at whatever they contain.
-Kad