Op it does suck but I believe she was following the law.
See link: http://www.dmv.ca.gov/pubs/vctop/d12/vc26708.htm
It it obvious in this thread that you were not following the law thus the reason you were there getting plate tickets signed off. This is probably what made her do it as you stated you had more than one.
If you like the sticker just buy another and call it a day