Thanks for testing and sending through all the details, it really helps.

I have created an idea for this and subscribed you to it so you'll receive updates

https://support.mixo.dj/t/traktor-mixo-rekordbox

Do you see the cuepoints correctly for the tracks in MIXO?

When the cuepoints are reordered in RB, are they all shifted up by one, or is it random?

I can't say when there'll be a fix for this, but we review our roadmap everyday so please know that feedback like this is extremely valuable, thank you!