GST refunds under rule 89(4B) and 89(4) - Goods and Services Tax - GST

Dear all.. I am an exporter of fabrics making zero rated sales without payment of tax. I have made export of goods under Advance Authorisation and normal exports with LUT. I have utilised common inputs and input services to export normally and also under AA. I have filed refund under 89(4B) for the exports made with advance authorisation with the formula prescribed under rule 89(4) . Also, I have applied proportionate refund for exports under LUT for the common inputs. Can I claim refund of the common input tax credits both under rule 89(4B) and 89(4) . As common credits are used, I have included the same ITC availed for refunds u/r 89(4B) in the net ITC calculation for refunds u/r 89(4) also.. Eg. I have ITC of Rs 1lakh related to input. The same Input is used in both normal exports and exports under AA scheme.. hence I have applied refund both u/r 89(4B) and 89(4) by including RS. 1lakh in net ITC calculation as it is a common input . Is it right as rule 89(4) says ITC availed for refunds u/r 89(4) should be excluded from net ITC calculation.. Or I should fully exclude the ITC availed for refund in 89(4B) for net ITC calculation u/r 89(4) .Kindly clarify.. Thanks in advance.