In the minecraft modpack hexxit, I have build a smeltery (Tinkers' construct). it works fine, I can pour stuff out, it smelts the ores right,... But I have two glitches. One is I can't see the lava level when I look at the smeltery controller (and yes I have actally right-clicked, so I see the screen where you put the ores in). But that one doesn't really bother me. the next one however is a real pain. I have smelted multiple metals. Normally, when you click, the metal you click on, goes to the bottom and it can be poured out. When I click, nothing happens. Are these glitches I can prevent and if yes, how?
Note: English is not my primary language, so there may be a few mistakes in spelling or grammar.