difference between P-chain on Pad

[racecube]

I would expect it to be the same if I have a Pad sound on 1 Channel or if I have a Pad sound on 3 channels chained in the global settings (of course Synth sound on all three channels exactly the same), but it isn´t not even in the harmonies. I´ve read through the manual and have no explanation for that behaviour.

Can you confirm that a chain on three channels with the exact same sound is the same as play it on one channel in case of harmonies?