While I was settings up I tried to break then I said /Sell all it sold the diamond pick axe..... you should make it never sell an item it should only sell blocks

Try this for selling ores....https://www.spigotmc.org/resources/autosell.2157/

As of now, Prison does not handle the /sell command (though it plans to in the future!). You'll have to use another system for now, such as Essentials or AutoSell.

Maybe essentials plugin?

If you have essentials it will most likely be that. if you would like to edit what gets sole it's in the essentials folder.