Profile Emblem Bug

I did a rook challenge where I extract succesfully as rook and unlocked an emblem and equipped it yesterday. 
Today I logged in and changed my emblem but now I cant find the rook emblem to re-equip and the challenge in the codex has been claimed and the emblem greyed out. So it means I have it. Either its bugged or the emblems are one time use only and if they are one time use only.... really? I hope thats not the case.