It is an instrument track, not an audio track or a MIDI track but a hybrid of the two. Do not attempt to clone an instrument track, break the track out into separate audio and MIDI tracks by right-clicking on the track strip and selecting "Split Instrument Track". Then clone the MIDI track. Or just copy the MIDI data into a new track.

Timeking
further clarification ... this track is a True Piano track that CONTAINS midi information.  I guess that is somehow different from a midi track.  Maybe that is why I can't clone it....

So it's an instrument track then ( which is what I asked in the first place ?) .  If you clone an instrument track it is linked to the other one, that is what it does. If you want to use the midi info for another synth, copy the midi to a new midi track and set the output to wherever you want it to go.

Yes an instrument track and it works the same way in X1.

As Paulo suggested back in post #2, there are issues with cloning Instrument tracks. I recommend you avoid it. It doesn't make sense to clone an Instrument, anyway; an Instrument track is by definition a combination of one MIDI track, one audio track and one soft synth.
 
If you need a copy of the MIDI pointing to the same synth on which to experiment, split the track first, and clone the MIDI track, only. In that case, though, you'll have to leave the original tracks split because you can't combine two MIDI tracks into one Instrument track.
 
If you don't want the cloned MIDI track pointing to the same synth, just create new track, and copy the MIDI clip(s) to it.

As another alternative, you could also Ctrl+Shift+Drag the MIDI clip down to open space in the clips pane - that should create a new MIDI track with the clip at the same point in the timeline.
 

I was going by the idea this was not a simple instrument track.  When are people going to stop asking a shortcut for getting a sound working quick from treating it as if it were the same as a MIDI and an audio tracks? It makes a lot of sense that a SI track is very limited in what can be done with them.
 
We say don't use them unless you want something quick and dirty and very limited.