Pb with Model:Samples midi input

Hi,
I have set my Model:Cycles and Model:Samples to receive midi notes for each track on a different midi channel : channels 1 to 6. The default inputs channels being respectively 5 & 6.
When I send notes on these channels, Model:Cycles receives all 6 channels (I see the lights on trigs), but Model:Samples does not seem to receive channel 1 & 6, only 4 channels light their trigs ?

I tried my own presets then factory presets, no change, am I missing some other setting or is it a pb with my unit ?