Dog spawns in front of me from a mile away in the sitting position locked in an iron door house

I'm fishing, and then suddenly my dog spawns in front of me in the sitting position. The dog was in the sitting position locked away in an iron door house several feet away. Seed: 63357246 with large biomes on and coordinates: X: -18.10949, Y: 64.000, Z: 23.70000. I cannot find the screenshots anywhere in the Minecraft folder, and am positive I saved the screenshot.