Unexplained Demand Drop

[Jazz]

Just started Beg World 2 based in Toronto.  Whilst waiting for new aircraft I prepped possible routes and populated a spreadsheet with the PX demand to each potential destination.  I went into each a few times and averaged the demand, so it should be fairly accurate.  And I started planning accordingly. 

Now a day or so later the PX demand all seems to be down a whack.  For example Toronto to:

Moscow S was 520, now 330
Moscow D was 435, now 335
Mexico city was 530, now 450
Kingston was 235, now 160

Is this par for the course in the game that you just need to cope with?  (If so, makes planning difficult!).  Or is there something strange happening here?