I´m exporting ORM definitions (yml format by default is selected by the program) in yml and the sortable behavior is ignored on export, is defined in the design in the program, but not included in the YML file.
Tried changing the format to XML on the Boundle properties, and the behaviors where included in the XML exported file.
Having behaviors included in the YML file is important becouse symfony and propel don´t keep relation between XML and YML definitions and is a common thing to have various YML definitions. So using XML export format is not a solution.
Regards.