Clarification in difference between GSTR-3B and GSTR-1

Murugesan (Asst. Manager - Finance)   (180 Points)

14 January 2019  
We are a Private Limited company. We need some clarification in GST. We have paid GST for the advance received from clients and adjusted the same while raising the Tax Invoices. But the query is in some
months we have not shown the Advance adjustment in the particular column in GSTR-1. But in GSTR-3B, we have shown the value correctly and paid the actual tax. Is there any issue in the above and any rectification to be made?