I am not familiar with any of your hardware or software so I may be way off base here. It sounds like you are recording on the same MIDI channel and track.

1-Set FL up to record one track with MIDI channel one and using your keyboard to play your part with the keyboard sending out data one MIDI channel one.

2-Set another/different FL track to record using MIDI channel 10 and your keyboard sending out drum data on MIDI channel 10.

In other words you must match your sending and receiving MIDI channels every time you record.

I hope this helps and good luck..

Doc-take it easy John this is just a sharp scalpel. It will not cut deep so don't worry.
Me-I'm not John
Doc-I know, I am!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware