extra large furnace not upgrading

i have upgraded my first large furnace but if i have any more they are saying fully upgraded but on lvl 1 still ?>

Can you send me screenshot from ingame and your config file?

Changed Status from Pending to Work in Progress

Here is a pic of the problem 

Sorry ,i have sorted it out for some reason something had changed this line

  "Large Furnace Cost Multiplier - Default 1.0x": 1.0

to 

  "Large Furnace Cost Multiplier - Default 1.0x": 0

which was stopping it from working correctly,i have adjusted it now and all is fine ,sorry about that ,i should of looked at the config file but i didnt .

Changed Status from Work in Progress to Not a Bug