Razorfish reported this but wouldn't report it as he's "sick of reporting bugs that don't get fixed". His words 
From chat:
10:56 PM
Razorfish: take a bbq
10:56 PM
Razorfish: fully load it using sorters
10:56 PM
Razorfish: all slots filled so cannot work
10:56 PM
Razorfish: remove 1 slot
10:57 PM
Razorfish: runt till charcola & fish
10:57 PM
Razorfish: put 1 slot back & it dissapears
10:57 PM
Razorfish: same with furnce
10:57 PM
Razorfish: you loose the material
10:59 PM
Razorfish: the bug is in the oxide plugin
11:00 PM
Razorfish: its not splitting stack correctly
11:00 PM
Razorfish: its not leaving 2 spare, only 1 spare
11:00 PM
Razorfish: you have charcoal & product, needs 2 empty
11:00 PM
Razorfish: it only leaves 1
11:01 PM
Razorfish: it cost me 10k sulphur yesteday, thats how i saw it
Server: Scourge