Statutory Reporter - editing cost of sales in P&L

I am trying to edit the cost of sales section in the P&L to include custom groups as I don't want it to just say 'purchases' on the P&L.  Everytime I enter a custom group it ignores it when displaying the reports or duplicates the accounts in the purchases section anyway.  I delete them & it puts them straight back.  

It also shows the custom groups above 'opening inventories' & you don't appear to be able to move them in account groups.  

Is there any way to fix any of this?