Glad I subscribed to this thread. I made a reservation for Munich Andaz for July some months ago... and my corporate travel system automatically searches for lower rates and like a month after my making the reservation and applying the TSU my company rebooked me at a lower rate. In rebooking me, they canceled my old reservation and created a new one... and my TSU was not transferred/reapplied.
I learned that when this thread prompted me to do a paranoia call to confirm all my future TSU applied reservations for the rest of the year, and caught that one. Luckily the suite is still available so TSU could be reapplied today.