Who's Eddie? Do you mean Gary?
I'm not quite sure what you mean when you say it works one way, but not another as there is only one way to green up on the grid.
Here is a video that demonstrates greening up. I first back Box of Frogs. I then move the cursor over to the level profit column. The level profit column is showing "what if" figures, ie. what your P&L will be if you green up. I then click the level profit column and you can see that the P&L is now what the "what if" figures predicted. Obviously in this example I did this before there was an opportunity to green up and actually "redded up", but it's the same principle.
http://www.gruss-software.co.uk/videos/GreenUp.swf