Same thing happened to me, got TAG for UC Davis but on my application one of my classes was omitted and another class I took was listed twice. I emailed the change to docs@ucapplysupport.net and I called all the colleges I applied. The UC application center people said that the changes will be attached to your application that was sent to your universities. I guess a lot of people make errors like this. I called up Davis and they said that they would first contact you before canceling your TAG if there are any inconsistencies. Hope this helps. Good luck