Story resetting itself

Story Mode is an add on, which is why it won't show by itself. You need to Online is the game itself and you would need to purchase that in order to play Story Mode.

So my accounts GOLD subscription and Achievements Are all gone AFTER THIS UPDATE ... please help im going to smash my xbox if everything is gone

Wish they would’ve sent out a notification or something. It freaked me out. If they would’ve notified me and been like “oh to fix one of our updates we need to reset your console” then at least I would’ve known what was going on.

They sent out a notification. Please check the
Xbox Wire often for information about the new release notes (among other things).

The specific release note that warned about the console refresh to factory defaults was announced here: https://news.xbox.com/en-us/2018/07/08/new-preview-alpha-skip-ahead-1810-system-update-7-8-18/

Hi there,

Thanks for the reply. In order to keep if from happening in the future, make sure you are connected to the network.
Saved games are automatically stored in the cloud while you're connected to Xbox Live. You don't have to select cloud storage. If you sign in to a different Xbox One console, your saves are available from that console when you sign in with your Xbox profile.

If you disconnect from Xbox Live while playing a game, you can continue playing. If you're not connected to Xbox Live when you leave a game, your game save won’t be uploaded to the cloud. You must connect to Xbox Live before you can use
the game save on another console. When you connect to Xbox Live, your game save will be uploaded to the cloud.

Hope this helps.

He hasn't been reset for modding as there is no cheater mark on his profile.I'd do what TroHAM has suggested first to see if that resolves the issue.