I am starting to look at the vendor bill variance articles on SuiteAnswers, but they seem overly complex.

Are they the only method of dealing with a Purchase Order where the Invoice is for a different amount?

Our users have been simply altering the Purchase Order to the correct amounts, but we have now uncovered that the Item Receipt contains GL entries for the amounts (which are not altered), and these are the default values put in the Invoice (meaning the Finance staff have to adjust these manually as well) - and now our stock values are probably incorrect.

I appreciate what our users are doing is incorrect, but before I start going into variance journals and other complications, I want to check we haven't missed any potentially simple solutions to this issue?