[NTG-context] frontmatter

[wwl at musensturm.de]

Hallo!

I am trying to use 'standardmakeup' to produce 'Schmutztitel'-page
with a following blank page. I think this is what 
\start\stopstandardmakeup is for (in doublesided environments).

But the example bellow has first a blank page and then 
'Schmutztitel'.

There is a fourth blank page too.

-------------------------
\setuppagenumbering	[alternative=doublesided]
\setuplayout	[
                    footer=.04\paperheight,     %1
                    grid=yes,                   %2
                    marking=on,
                    location=middle,
                    width=middle,
                    height=middle]
\starttext
\startfrontmatter                               %3
\startstandardmakeup
Schmutztitel
\stopstandardmakeup
\stopfrontmatter                                %3
bla
\stoptext
-------------------------

My experiments:

- a space-char between 'doublesided' and ']' removes the last blank 
page (strange).

- uncommenting the lines in position 1,2,3 exclusivly results in the 
correct behaviour.

I would like to understand what the problem is and why, for example, 
uncommenting frontmatter solves the problem.

I thought frontmatter is the place to do title-things and so.

Grüße, Wolfgang