Not sure how can you set 2 attributes, as one channel....
Can you upload your User Profile, and post a link here?
As said, you cannot have both worlds, in such an unusual fixture...
- Either set Pan Tilt attributes as Pan, Tilt, Tilt 1. In this case Pan & Tilt will combine, to work like a regular fixture, with a single tilt. The 2nd tilt attribute will run independently, under the FX engine
- 2nd option, is separate these 3 attributes, by naming them differently, for example Pan 1, Tilt 1, Tilt 2. In this case, you will loose the special PT combo FX Modes, such as Circle, Ellipse etc.. But you will be able to link both Tilts, to work as one attribute
Finally, some manufacturers, has a special control channel, that will let you change the Tilt mode in the fixture, to wok as a single tilt
Fixture Library Support