There are two files on your PC where these are saved maybe the game client has a problem updating them.
Look in the "Elder Scrolls Online" folder in My Documents, then in 'liveeu' (or 'livena' I guess) you'll see a file called 'UserSettings.txt', then in the SavedVariables folder a .lua file.
Those two seem to contain all the config settings in the game and mine were updated at the time I logged out last time.
Pretty much all settings, like show health bars, show action bar, chat window size and position, addon settings. Not the biggest issue, but somewhat annoying :-)
they are messing up the identification of your character currently it thinks im madmac@"" use to be madmac@madsmacus
so any ui or addon is reading writing the wrong info to the lua
fed up of it too :¬(
I think that the resetting of settings are the least of our problems now. After banks gone last patch, we now have entire contact lists and guilds wiped...