You could upload the preset, so you probably can upload another one. It should be .SPP, .PDF or a picture, no archives. This site is continuously declared as "spyware", I don't know why but archives trigger that more often.
Pan center can be triggered by the list of 2 actions:
* strip CtrlGroup <First in WAI> + 0..7
* value Absolute 0.5
To make X-Touch One work properly in Mackie mode, you need to define that for all 8 pots with n = 0..7.
In general pots control many things, so corresponding controls look way more complicated.