this seems to happen in both the crafting table and the regular inventory recipe book i have no idea what could possibly be causing it. it happens across texture packs aswell
MC-120819
Dyes in recipe book doubling
Resolved
Duplicate
0
(Unassigned)
Unconfirmed
dye, recipe, recipe-book, recipe-book-tab
Minecraft 1.12.1, Minecraft 1.12.2 Pre-Release 1, Minecraft 1.12.2 Pre-Release 2, Minecraft 1.12.2
Retrieved
That shows that it has multiple crafting recipes.