Hi again,

you could remove the \localcontrolled around the advance
>

I thought I tried that, but the counter incremented to 6, instead of 4.
Using higher-level primitives seems more like the ConTeXt way.


> why twice ? you only have to typeset the text once, right?
> >
> {text:\number\numexpr1+\rawcountervalue[ConcurrentTextGetCounter]/2\relax}}
>

I don't know why the counter is incremented twice for each concurrent
environment; the document is typeset once, in three passes. Dividing by two
solves the issue, if there's a deeper issue, I'm at a loss to explain it.

Greets!