Just a heads up so you don't wonder what is going on if this occurs (either in this ressie or a future one).... but each night of a reservation needs to booked with either Trust or Legacy points, not a combination of them. So for instance, if you have 200 Trust Points and 200 Legacy points in your account, and you try to book a room night needing 300 points, even though you have more than enough total points (400) to cover the needed ressie (300), the system will not allow you to book it because you don't have 300 Trust or 300 Legacy. Its one pain in the butt nuance to the system, so I figured I would mention it so you would be aware.
To clarify, I am not saying that you cannot combine Trust and Legacy Points into the same reservation....you can, but what I am saying is that each and every night in that reservation must be booked with one or the other, and that can cause issues.