[NTG-context] setupenumerations overwriting setupitemize

A general question. I use setupenumerations to define theorem-, lemma-, and definition-environments for my document. I realised that setupenumerations is overwriting keys that are set in setupitemize (and groups defined by defineitemgroup). ~~~snip~~~ \setupenumerations [numberconversion=numbers] \starttext \startitemize[a] \item Text Text \item Text Text \stopitemize \stoptext ~~~snip~~~ vs. ~~~snip~~~ %\setupenumerations [numberconversion=numbers] \starttext \startitemize[a] \item Text Text \item Text Text \stopitemize \stoptext ~~~snip~~~ This is unintuitive for me.. Is this expected behaviour??