The Trophy "Castaway" (Eat nothing but kelp for 3 days) Refuses to pop, or be added to my trophies earned, ive created a new world, deleted and reinstalled the game and have done exactly what it says for 6-10 in game days. still with no success. other people have had it work for them in only a day. 
It absolutely refuses to give me that trophy, and like I said, ive recreated a world, not copied, reinstalled the game itself (says its up to date with updates) and have exceeded the days needed for it. yet nothing,... all ive done each day is eat the dried kelp.