Export.SAV_EXPORT is not implemented yet, main reason the new export does not have a flat csv export - csv export to a single file - and the old method has some faults. I had asked @larryweya for some pointers on adding this functionality into the new export. I believe implementing the missing piece in the csv esport will better serve us hence the sav export should use the new functionality when implemented. Currently the repeats go into separate sav files hence the SAV_ZIP_EXPORT.