A double dating problem

Wonderful inspiration this morning: I'd been worrying about how to make sure Christine gets paid if she plans to leave immediately after the gala, given that her contract presumably commits her to perform in the full opening season. I'd also been irritated by Lloyd Webber's sloppy dating, given that the real Manhattan Opera House opened in December 1906.

Then I suddenly remembered that Hammerstein had other opera houses elsewhere in America: why not send Christine off to Philadelphia instead while awaiting the real opening time? Admittedly this would involve redating the story to 1906 instead of 1907, but then that one wasn't my error in the first place!

Finally I checked the facts... and found that, sadly, the Philadelphia Opera House was actually opened two years after the Manhattan Opera, in 1908 :-(