Achievements Overkill and Adventuring time not unlocking

I met the requirements for both of these trophies and they won't unlock. I've seen pretty much every biome within a single survival world, except maybe some hill variations, let alone the 17 that are required for the trophy. For the Overkill achievement i got a smite 4 diamond sword , drank a strength 2 potion and killed some zombies, drowned and skeletons which should've given me the trophy.