Hi!
When placing a device onto a Drum Rack Pad, the default MIDI note the device is set to receive is always C3, no matter what Drum Rack Pad you place the device onto. If you want to set the pitch that triggering a Drum Rack Pad will output to something else, toggle the Input/Output Section of the Drum Rack (I-O icon at the left edge) and set the value in the Play column of each Chain to the desired MIDI Out note:
If you have already done that, but still have the issue, please share your Ableton set.