countryside achievement?

just picked this up this morning, went through track by track on the countryside came 1st, unlocked next one till the end one, did the end one & thought i would unlock the achievement, didn't happen so did it again selecting all five as a competition same again nothing, look on the achievement says 33%?

Just do them 1 by 1, I didn’t have a problem with this achievement but the next as though I won countless times on winter track 5, Achievement didn’t pop and was stuck on 80%. Tried next day and unlocked straight away so I think the game’s a bit buggy.