I do not see any basis to contest either, at least according to your statements above. It seems like you cannot contest either violation. It makes little sense to start a fight that you cannot finish or win. I would simply pay the fines and request traffic school. Then move on in life.
For Van Nuys speak with an attorney familiar with their procedures in dealing with both offenses. Get an attorney.
ANDREW ROBERTS CRIMINAL AND TRAFFIC TICKET DEFENSE ATTORNEY
Contact Stan Alari a lawyer who handles traffic tickets all over California. Find him on line and look at his website victories. He has helped clients of mine in the past.
I respectfully disagree with Mr. Hill, above. Although you do not present any information that leads me to believe that you have a strong defense, nearly every traffic ticket can be defended to some extent.
I am frequently able to negotiate traffic violations to non-point violations, regardless of the circumstances. My advice is to retain an experienced traffic attorney and fight both tickets.