So, for the entirety of the time you were in the lane it was dashed? I know that in CA the HOV lane is (as you stated) double yellow lines, but the exception is made at the exit/entrance points of the lane. So, was it just for a short distance it was dashes and then became double-yellow?
Also, my information here is based only in SoCal, which may or may not be relevant to your situation, so which part of CA were you in at this time?
The only thing worse than getting into an argument about politics is getting into an argument because you refuse to argue politics.