Nope - I never lock out CHP/Capitol from Close Call - I'm a 5 minute walk away from the Capitol and the Governor's home, so I'm always trying to catch nearby traffic and non repeated transmissions.
Consistently I can hear 453.2 traffic on 464.4875. From inside my home, the quality is marginal, but becomes much clearer if I move my 396XT up to a window.
My first thought was that 464.4875 was part of a repeater network/extension to reach other parts of the county.
I'm not discounting any anomaly - but the consistency caused me to post the question because to me, it seemed legit.