OK, I've kind of sorted out the orders...
Spoiler
I've worked out which order is for which person, but how do I rearrange them so they go up the right pipes?
Also, is the colour significant? Am I supposed to match the colour of the orders to the colours of the pedestals they are on, or the pedestals of the person whose order they are, or what?
I notice that it looks like you have to match the colours in both the English and Japanese games, meaning you have to select a row and a column.
Spoiler
OK, I've got it... the dials on the walls.