this software is rubbish, the fact this has to be explained so many times shows that it isn't working as required for your customers and not clear, I click receive payment click on the open adjustment note, firstly it applies more than available from the adjustment note and then it also still shows as unapplied in the customers transaction list after completing this step. 

easier to give product to my customer for free than waste my time trying to jump through 200 QB hoops