Have you only just logged in since downloading the Imperial City update?
If so all skill were reset because there have been many changes to the way they work. After any skill has a large change ZOS will refund the SP so you can choose if you still want to invest in that skill or not.
@Turelus - EU PC Megaserver "Don't count on others for help. In the end each of us is in this alone. The survivors are those who know how to look out for themselves."