HFM Proportion member is not equal to Parent total

Hi All

I am facing one issue in HFM , where balance sheet is not tying up at top level entity but at base level we don't have any differences, Ran consolidations and calculations several times but differences are still there, on drilling down further i noticed one of parent entity is contributing exactly the same amount equal to the difference at top level and observed through value dimension members , where i see [Parent total] and [Proportion] not equal to one of the entity , where this entity is 100% owned but when amount is flowing from [ parent total ]