When your cooking pot is empty, and you put coal in it, it only smelts 1 item per coal. It should smelt 10 items per coal. It shouldn't have anything to do with the top number. Me4502 said it was just internal timing stuffs. :p

 

me4502 responded, found and fixed the issue within minutes. It was like watching a miracle before my own eyes.

These developers are awesome!

 

When I have a cooking pot with fuel in it (let's say 1000), and I place an item to be smelted inside, it will cook like normal. Whilst cooking, the top number (line #3) will shoot up while the bottom number (how much fuel is in the pot) hits 0. Instead of stopping at 0, it will go to -1. Once to bottom number hits -1, the top number will shoot down. Whilst shooting downwards, it is still able to cook items until the top number hits a low number (10, 20, 30, 40, etc.).

In this video below, 1 coal= 20 fuel. Yes, this is intended as the amount was changed in the newest build.


In my next test, I had a cooking pot with a few stacks of cobblestone in it. It started out with no fuel inside. When I added fuel to the cooking pot with items already inside, it cooked 4 items per coal. Once I added more, it cooked a random number of items.