[NTG-context] newcolumnsets: Why are settings only applied on left pages?

Dear list, I want to have columns of different widths in my document.  Therefore I'm using the newcolumnsets (aka pagegrids).  However, it seems as if my settings are only applied on right pages.  Why is that?  I tried adding page=left and page=right but that doesn't do anything.  MWE is below. Cheers, Henri --- \usemodule[newcolumnsets,visual] \definepagegrid[example][n=3,distance=.05\makeupwidth] \setuppagegrid[example:1][width=.4\makeupwidth] \setuppagegrid[example:2][width=.25\makeupwidth] \setuppagegrid[example:3][width=.25\makeupwidth] \starttext \startpagegrid[example]   \dorecurse{6}{\fakewords{50}{75}\column} \stoppagegrid \stoptext