Cue track C and D?

All should be correct like this, unfortunately.

Z1 can control only 2 decks (A & B)

Mode button when used with Traktor Pro on a computer just switches between 2 filter modes (standard and ladder). The “FX” on the knob is just for Traktor DJ on an iPad: there the Mode button will switch from controlling the filter or the fx.

Mode plus CUE A or CUE B is correctly triggering Play/Pause for decks A & B on Traktor Pro desktop.

This is how it behaves

Doesn’t this depend on if you chose internal or external mixing?

@Stephen S having F1 lets you control those decks, but should not have any influences on cueing on headphones

It's not weird, the Z1 is a 2 channel controller, made to control 2 decks.

If you add a F1 you could control a remix deck on C or D (Or A or B for that matter)

But you could not control FX, CUE, EQ or total deck volume for deck C and D unless you add custom mapping.

You could remap the Z1 so you have CUE C on Shift + A?

Yep I didn't realize it wasn't possible when I bought the Z1 either. After thinking about it, I realized that if it did switch to the other decks the knobs would jump position since the controls don't match when switching back and forth. So cues on C and D are useless anyway.

There is a function that can be mapped called soft-takeover, to catchup to the positions when layering controls. But in my opinion it gets way to confusing and very tedious.

I also realized that the crossfader would need disabled via mapping in order to use along side another deck controller. Because the slightest touches between separate controller positions would also cause jumps.

And the Z1 has a soundcard, so adding any other controller wouldn't really work unless it was midi only. But still only audio on A and B so pretty useless to try and integrate.

I only use the Z1 when testing tracks for mixing while in my living room.