Were you booking the 11 month mark? Were the banked points for that resort? If no, then you might not be able to use the banked points unless you book at the 7 month mark even for your home resort. The home resort priority period has to used your home resort even if that means using current year points versus banked points.
Or if you were booking the 7 month mark then call MS again and hopefully the next CM will understand that you just want them to swap the banked points into your reservation as in my bad, I didn't select the correct order for the points. Although I would have expected the system to use them in the correct order of banked points first, borrowed second and current third.