I managed to free up some points for the contract which is causing problems. After freeing up the points I could modify down to number of points I had freed up. After confirming, the points which was not visible now became visible again and most importantly usable again. However it requires a cancel and rebook to free up the last night points.
MS said they would hold the dates for me, so I figured I could sort of play with the reservation.
Started freeing up 1 night at a time and suddenly the nights from both side of what I hold was gone. Normally not possible during 11 month window, but I guess MS or their support team are holding several nights for members.