Yes, I changed the addons that had profile setting to the settings on my old name. But some addons, specifically like TotemTimers, if you're familiar with shaman addons, don't save properly.
I would try going into your WTF folder, go into your old name's folder and copy everything. Then paste it into your new server/name folder. Restart the game. For future reference, always back up your interface and WTF folder to avoid something like this.