Difference in ITC as per GSTR 2A downloaded and auto populated in GST Portal - Goods and Services Tax - GST

Dear Experts, Why there is a difference between the ITC amount reported in the GSTR-2A downloaded and the sum of ITC auto-populated in the ITC comparison table as per GSTR-2A in GST portal, even after accounting for all adjustments? For example, the ITC of IGST amount in the GSTR-2A report downloaded (excluding RCM and after all the adjustments) is 2,00,000, whereas the ITC of IGST amount auto-populated in the ITC comparison table as per GSTR-2A (excluding RCM) is only 1,20,000. Thanks in advance