[NTG-context] Line numbering in columns

Hello, I'm just curious, why line mumbers appear mirrored (on the right side of text) in the rightmost column? \starttext \startcolumns\startlinenumbering\startlines Fly me to the moon Hit the road jack Sway Libertango Sunny Besame mucho (Em) La Bamba Hey-na-na-na Venus (Dm) El Talisman Oye Como Va Chatanooga choocho (capo II) Beautiful Agua de beber + Masquenada Kiss Me Ain't it Funny Pasadena Don’t Want To Miss A Thing (capo II) Old Devil Moon (capo II) Got My Mind Set On You Baila Morena \stoplines\stoplinenumbering\stopcolumns \stoptext Another question is options of linenumbering command. Context 2006.03.20 introduced "A few extra options for \startlinenumbering", but texshow show only [continue] option. Vyatcheslav