Okay, so I have been trying to get some cats grown/tamed/sitting, so that I can breed them to get ocelot eggs. I realized that because untamed ocelots and kittens count as hostile mobs, you have to stay by them in until they grow and you tame them, because otherwise they despawn. I managed to get 2 cats fully grown and tamed, and they are good to go. A couple days ago, I bred them, let the kittens grow, and then put them in sit mode. Now these two new ones were exactly the same as the two other ones. However, the next time I logged on, they had despawned. Today, I again tried the same thing, and once the two more new ones were grown and tamed, I had them follow me around, bred them, and then placed them sitting. I logged off and on quickly and they were still there. Just now, however, I logged on and they were gone again. So for the life of me, I cannot manage to get more than two tamed cats. Does anyone know what could be causing this or how to fix it?