Don't panic just yet... one thing those three (?) shows that aren't on the Myspace list have in common is that they are non-Ticketmaster shows. If the staff who updated the Myspace page pulled the list from some kind of industry-side Ticketmaster thing, they might just not be on the list.
If you check each venue from the tour page here, none are showing up as cancelled at their respective ticket sales sites.
Crossing my fingers for those of you hoping to see those shows!