cmark sxml problem (also chiccup sxml)

Hi!,

I am using chiccup to auther html pages
using what I thought was "SXML".

Like:
((h1 "Header!")
 (p "This is a paragraph..."))

This works great.

Now I am using cmark to process markdown
to sxml and intermix it into the chiccup.

The problem is that in cmark and specifically
(cmark-sxml "# Header!
This is a paragraph...")

The output sxml is like:
((h1 ("Header!"))
 (p ("This is a paragrapoh...")))

Why does cmark-sxml wrap those atoms in
parenthesis?  It is messing up the 
final conversion to html.

Any ideas?

Thanks!,
Paul Wisehart