You don't ask a question here, but I think you are saying, this is unfair. Sure, it's unfair. Unfair doesn't mean illegal. What you describe violates no principle of law that I know about. Employers do unfair things all the time, but that doesn't make them unlawful. My suggestion is that you stop using your laptop at your desk clerk job. Insubordination occurs when an employee violates a supervisor's order. Insubordination is good cause for termination in every jurisdiction that I know of.
I'm not licensed in California so don't take what I wrote above as legal advice. If you need legal advice, please consult a lawyer who holds California licensure. That's not me.