I have a few sets of items in my mod which use metadata, and I'm having troubles with naming them.

I have 4 sets of metadata items: softClay, hardClay, magicOrb, and rune.

They're being named like this

        String[] mouldNames = new String[] {"chunk", "Cog", "Key", "Lock", "Keyring", "Ring", "Amulet", "Necklace", "Crossbow Limbs", "Orb"};
        for(int i = 1; i < mouldNames.length; i++)
        {
        	LanguageRegistry.addName(new ItemStack(softClay, 1, i), "Clay Chunk with " + mouldNames[i] + " Imprint");
        	LanguageRegistry.addName(new ItemStack(hardClay, 1, i),  mouldNames[i] + " Mould");
        }
        LanguageRegistry.addName(new ItemStack(softClay, 1, 0), "Clay Chunk");
        LanguageRegistry.addName(new ItemStack(hardClay, 1, 0), "Hardened Clay Chunk");
        
        String[] runeNames = {"Blank", "Energy", "Rock", "Frost", "Fire", "Life", "Death", "Temporal", "Eternal", "Balance", "Corruption", "Poison", "Wither", "Fear", "Elemental", "Catalytic"};
        for(int i = 0; i < runeNames.length; i++)
        {
        	LanguageRegistry.addName(new ItemStack(rune, 1, i), runeNames[i] + " Runestone");
        }
        
        for(int i = 1; i < runeNames.length; i++)
        {
        	LanguageRegistry.addName(new ItemStack(magicOrb, 1, i), runeNames[i] + " Orb");
        }
    	LanguageRegistry.addName(new ItemStack(magicOrb, 1, 0), "Magic Orb");

As you can see with the above code, a rune item with metadata of 4 should be named "Fire Runestone", but is instead being named "Fire Orb", and the same goes for the rest. a softClay item with metadata of 1 should be named "Clay Chunk with Cog Imprint", but is being named "Cog Mould", and when I try to name only one item from this whole set, say a magicOrb with metadata of 0, Every one of those items with metadata of 0 will get the name "Magic Orb". This has been happening for weeks and I thought it might have been a bug that would get fixed by now, but it's still happening. Any help would be great.

Check all your for loops start with

for (int i = 0; ...)

 

two of yours have i = 1.

I know, they are supposed to, as the variant with a metadata of 0 has a different name.

Ah... I see...  .

 

Are you sure that hardClay and softClay aren't equal? And the same for rune and magicOrb? That seems like the most likely explanation.

Well, softClay and hardClay are both variants of the same Item Type, ItemMould. That wouldn't affect naming though, would it?

Nope, it shouldn't affect the naming, afaik. However, maybe try using different classes, as that MIGHT still be the problem...

Thanks for the suggestion, but it didn't work. This is so weird.