Dosomethingidont

I have essentials, but i do /setworldspawn and /setspawn and when I die I am always about 10 blocks from spawn somewhere, but I want to spawn on a specific block. It shows coords that have been set, but I guess it doesn't work??? Is there any way to get a specific block spawn? I even tried command blocks on a clock.

what is essentials?

I made a server and when I do /setworldspawn, it says that it made the server spawn point with the coordinates where I am. This to me seems like it means t worked, but when I die I spawn somewhere else. My other server worked when I used this command and they were both minehut, what;s the probem???