Things disappearing

name tagged Villagers, Animals in 10x block enclosures and item frames disappearing after a save/log out and then re-logging back in. My villagers have been traded to the max and name tagged. I name tagged my horses and they had armor and saddle. Cows, chickens, sheep and pigs are gone inside a fenced enclosure no bigger than 10 blocks square. I lost maps from de-spawn when item frames disappear.