So I was transporting myself and a horse via command block. I used @e near the start of the command. I arrived at my destination with the horse as well as two others from another part of my world. The game also said teleported 1365 entities but none of them appeared. Firstly I don't understand why this happened but they didn't appear and none of them (e.g. pets and villagers) were at the places I saw and left them. Where are they? Can I get them back somehow? And how can I stop this happening again?