inDesign CS 2

Problem: I have Chapter Opener master pages (a single recto) and Base master pages (facing pages with their text boxes linked in the master). When I flow text from a Base page to the next set of facing Base pages using Super Autoflow (holding down Shift) CS adds pages BASED ON THE CO MASTER, not the BASE pages from which it originates. Is this a glitch or am I doing something incorrectly? The Base pages are not based on anything, nor are the CO pages....Help!