I suspect that you're trying to place it above the upper side of the scene. You can spawn it outside the screen, but not outside the scene (as there's literally nothing there).
Try making the scene a bit taller than the screen, at least 26 pixels (as you're trying to put it at -25).
Thanks Morphman, I suspected the same thing, but I don't know how to restrict the camera from the 'out of bounds' part of the scene.
Whats weird is I can tween and/or set the coordinates for another actor with the entirely same setup as the previous UI element and the problem resolves itself. Heisenbugs are fun.
I'm trying to letter box for a cinematic effect. What I think needs to be done is manually placing the ui elements at the edge of the screen on a layer with 0 scroll factor, hiding them upon creation, tweening them off screen and then unhiding them and tweening the ui elements back onto screen when the cinematics are activated.
There a work around implemented where I just placed the blinders on the respective portions of the screen, top and bottom, set scroll factor to zero, and fade in the cinematic layer upon activation.
In any case things are working now, and I want to say thanks to each of you for your help.