How to ride the rebuilt TILT train and the TILTLANDER on the same trip

[Tramwayjohn]

I hope to make a video of the rebuilt TILT train in Brisbane tomorrow [ 15-7-16]  but if people want to ride that train AND sample the loco hauled TILTLANDER they can depart Brisbane on a Tuesday for say Bundaberg, and then travel to Brisbane on the TILTLANDER the next day. My question is. . . . . HOW and why did QR table the TILT to Rocky on a Tuesday, but NOT have that train return to Brisbane the next day? Just wondering.