PR Location does not pick the specific sub inventory when creating a PR

We have created a new Deliver-to-Location under a specific Requisitioning BU and we have not created any sub inventories for this specific location.So,when we try to select the subinventory for that specific Deliver-to-Location there should not be any Subinventories as we have not created any for that.But,in our case when we just click on the drop down arrow under Sub inventory it shows some subinventories for that specific newly created Deliver-to-Location which should not happen and those subinventories which are shown under the "Sub inventory"drop down are related to the Specific Requisitioning BU that we have selected.Also this Specific Requsitioning