1dot2

Using the video Minehut uploaded to youtube I tried to upload a plugin for more mob heads. I did as they said, recreate the whole file with every last folder. I even triple check and the plugin won't work. I restarted the server each time i checked and still nothing. Also the same problem for a wandering trader plugin. I tried /plugins list and it only showed world and bukkit. Any help is appreciated.

This happened on my server yesterday to my friend and happened to me too a few weeks ago, he was playing for about and hour or so and he made some pretty important progress, when he rejoined his progress from when he was playing was reset but not anything before that. Any ideas how to prevent this, he is pretty bummed because he did some pretty grindy stuff. Any help is appreciated.