Yes, not working properly.Download option also not provided to convert to excel and make the reconciliation. Before filing we need to copy each and every invoice details to excel which is terrific job to do reconciliation. we also need file the return and system not supporting us.Dont know how system will allow this many returns this month- GSTR-1 for three months,GSTR-6 and GSTR3B of Nov'17.
For GSTR 6 information in user manual given by GST portal explains - it will be auto populated by GSTR-1..., if any missing invoices we need to add, once added, can't see or modify or delete.. In such case for July 2017 due date is 31st December, how one can submit or upload wrong data......