[NTG-context] columnsets

Hello, I have a question regarding columnsets: ================================================== \definecolumnset[two][n=2] %\setupcolumnset[two][1][width=4cm] %\setupcolumnset[two][2][width=8cm] \starttext \startcolumnset[two] \dorecurse{10}{\input tufte \par} \stopcolumnset \stoptext ================================================== a) I keep getting a blank page after the columnset. How do I get rid of it? b) the setupcolumnset has some effect (making columns smaller) but they are both the same width. Why? Patrick