I am not sure what you mean by "game share", but from other posts on the forum, it looks like accounts have been closed over sharing, so I am guessing it is against the terms of service. Maybe that is just on pc? Not sure what it means for console.
Whatever it means, though, buying one gold edition and having it apply to two accounts does not seem right, so it is probably the explanation here.
If you are game sharing ESO on your home Xbox the DLC content will not be available to other users.
DLC's are attached to the account that purchased them.
Edited by ZOS_PeterT on January 3, 2017 5:29PM
The Elder Scrolls Online: Tamriel Unlimited - ZeniMax Online Studios