Custom Recipe Not Working

So here's the recipe in question.

And I'm calling this recipe here.

And it's linked to the GUI for the specific item here.

Here's what's happening, when I put my bones in the specific slot, the bone meal doesn't pop up. If I take one bone out then the recipe pops up but at one third of the amount it's supposed to give (in this case 3 bone meal for two bones) even though the bone is missing which means the recipe is incorrect. If I add the bone back, now it outputs the desired amount (which is 12) but the recipe should show up properly the first time. I have zero clue what's causing this.