This is most definitely a BUG. Get a huge invoice adding up to the exact PO amount with a customer that likes all specific hardware items and prices listed - and then find out you accidentally entered them as 'services'. So you have to delete all of them and re-enter them rather than just have the option to change them to 'hardware.' No customer should be forced to use the inventory management system built into QBO rather than just have the convenience of editing the invoice where it makes sense. Seriously.. do things like this ever get fixed in Quickbooks Online? It really feels like the majority of development effort is to add more ads and clicks and submenus between where I am and where I want to go.