Orbeon Checkbox issue with pdf template

After following instructions from orbeons wiki

From: http://wiki.orbeon.com/forms/doc/user-guide/form-builder-user-guide#TOC-Creating-a-PDF-template-for-use-wit 

"Non-exclusive checkboxes Use PDF checkboxes Use the same name for all buttons Use different export values for each button The checkbox value (and NOT label) is used by Form Runner to match on the export value"

we have not been able to allow checkboxes to a pdf template. It will allow one value to be passed. When you select more then one value in the Orbeon Runner the pdf doesn't show any values checked.

here is a sample form i built with an attached pdf: http://www.orbeon.com/orbeon/fr/testCheckBox/checkbox/new

Thanks!