Skyrim Creation Kit Chest question?

The first answerer is correct. You altered the base chest which affected all the chests by that name.

What you need to do (once you have reverted the original base chest back to what is was before you altered it), is to highlight the base chest in the object window of the creation kit. Then right click on it and choose "edit". Now type in a new ID (first field). Now change up the Item List to whatever you want to be in the chest.

Now click "ok". You will be prompted to "create new object". Click "yes" and a new base object identical with the original (except for the contents) will be created. You can then drag and drop as many instances of the chest as you want into the render window wherever you want them placed.

Ah, I see what you've done.

You accidentally edited the 'master' draugr chest, and changed all of 'em. If you undo what you've done, it'll reset all the world's draugr chests to what they should be.

To make the ones in your home again, simply 'steal' the model/texture of the chest and turn it into a 'new item' in the game's registry. This will give it the appearance of a Draugr Chest, but it technically wouldn't be. That way you can edit its contents to your heart's content, and all the actual Draugr Chests in the world would remain as they are.