I'm assuming that you're using IA buttons or some other actions. If that's the case, you need to add a bank select in there. CC#0 is bank select and the value of CC#0 is multiplied by 128 and added to the preset number.
For example:
Axe-Fx / CC Toggle off:None on:0
Axe-Fx / PC off:None on:10
selects preset 10
But:
Axe-Fx / CC Toggle off:None on:1
Axe-Fx / PC off:None on:10
selects preset 138
And:
Axe-Fx / CC Toggle off:None on:2
Axe-Fx / PC off:None on:10
selects preset 266
If you start using banks, you'll need to always send a CC#0 before every PC, otherwise you might get unexpected results.
If you use the "PC Messages" section of the Presets tab in the GT to do your Axe-Fx preset selection, you only need to specify the full Axe-Fx preset number, and it calculates the CC and PC numbers for you.