look at this screenshot: http://image.prntscr.com/image/a4a935fbde8042f59377886255adcdf4.png
i want 1500x logs,300x iron_ingots and netherstars but it only takes iron_ingots :(

(it takes only the highest in the list)

i tried shaped once too

Code:

Shown in GUI:

Result:

U see the requiements are listed in a random order (why ever) in the gui.
But if you klick the Item - no items where taken from the inventory, and you also get nothing..
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.
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i also tested your shapless Version, and yes this just takes the first ressource...

Code:

Shown in GUI:

Result:

U see, just the first listed requiement is listed in the gui.
If you klick the Item - just this first shown requirment is taken and u get the item.
Also i can agree that it just take the highest value of needed items here...