refineries and furnaces fuel consumption

So I know this is still a work in progress and VIP dont need to use fuel (unless we want charcoal anyway);  but it seems to arbitrarily decide if you use wood (if you have it in your inventory).  One of a few things will happen..  A.  No wood at all gets put in.  B. Presumably the correct amount of wood gets put in.  C.  Double the correct amount of wood gets put in. and D. when trying to fix this (by shoving stuff in and taking stuff out, etc. it gives you your wood back but seperates the stack leaving exactly 1 wood out of the main stack. (very odd that last one).  Anway... low priority.

Thanks,

++ Sharla