Gstr1 online: 7 b2c : unable to add more than 1 invoice

GSTR1 Online : First invoice shows up when added. When I  add second invoice (Add details & Save), I get request accepted message. But instead of adding 2nd invoice the first invoice fields are updated with the 2nd invoice.  Only the last invoice is displayed in table 7. GSTR1 shows "1" invoice in Table 7. 

Anyone who added multiple invoices in 7 B2C  (small invoices to unregistered) , kindly help.

Thanks