When entering to the enchantment table's GUI, in the object input box for enchanting it, has a bug where are two when hover.
The attached image is an animated GIF.
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You are using a resource pack, causing that bug to appear. One slt, closer to the enchantments, is for lapis. Other slot is for enchantable items.
Outdated resource pack. Since 1.7 you need Lapislazuli as "currency"