Hey there
This is new issue with Air Music instruments. When I insert new instrument, such as Hybrid or Loom or Strike, the instrument on previous track continues to trigger. I would go there, click on things and then it would stop, but I can't tell what exactly makes it stop triggering. This time I poke different things but it just continues. I have it set right, as I always have them. Nothing new. Also not all tracks triggering but last track I was using. Why? Thank you. 
Edit: Looks like it happens because all new midi tracks set to "None/ Omni" or "All inputs" and pick sounds from other tracks. But I like it to receive from All Inputs as I have multiple MIDI controllers, but it should not be getting notes from other tracks. because I do not transmit to All. One of the tracks that transmits to other tracks is the track with step sequencer on it and I don't see any settings for step sequencer to select what tracks to transmit to. 

Ok, I hear the MIDI data on another track because another track set to Omni and receives all midi data. But how do I stop previous track from sending MIDI to all other tracks? I have Midi Output unchecked in Synth Rack, unchecked "Force MIDI Echo through current track", but soon as I light up the little blue icon on the track, it starts catching up MIDI from another track. Thank you. 

Now I am working with Kontakt. Then I insert new synth (Rapid). I have new track selected, but nothing changes- it still playing Kontakt. Going up and down between tracks. Still not changing- Kontakt is sounding when I am on Rapid MIDI track. The Input for this MIDI track is Komplete Kontrol Ch1. Output: Rapid. The Instrument Input "Rapid", Output "Master. So why do I hear Kontakt? Thank you. 

Ok, I think I may be fixed it- I selected "Always Echo Current Midi Track" and it automatically enables and disables the Echo button when changing tracks. Will see if this is what it needed. Thank you. 

"Input Echo" is the key to what you want to hear playing back.  You can set all tracks to "All Inputs> MIDI Omni {or channel #}" this way, and control what tracks play by setting "Input Echo = On" for your chosen tracks.
 
Otherwise you can select the specific controller you want for each track "{controller name}> MIDI Omni {or channel #}", but you would still need to set "Input Echo = On" for your chosen tracks.