I don't know about Orange COunty. WHat you have said so far sounds pretty standard, except the push the patrol car test. Physical assessments for LE have to be job-related and defensible in court. The pushing the car test doesn't sound like either (pushing cars is why they put buddy bumpers on patrol cars).
As far as the rest of the process, again, I don't know Orange COunty, but what we look for are;
-Demonstrated good judgement (or lack thereof, especially in the background and credit checks). What your former employers have to say is probably of the utmost importance, but if they have negative things to say, and you can document why they are wrong, we usually listen.
-Communications skills. Comunnications skills, Communications skills. Your ability to communicate will keep you out of trouble. Your ability to communicate will keep you out of using force. Your ability to communicate will keep you out of IA. Your ability to communicate will keep the public happy. Your ability to communicate will lead to good cases, good reports, and will allow you (or the investigators) to lock up bad guys. Communications skills and the ability to articulate what you did and why you did it are far more important than the ability to shoot, do martial arts skills or anything else. 95% of your job involves talking to people, and if you can't do that very well (or at least get good at it) you won't be a very good cop. The other five percent is mostly not running into stuff with your patrol car and being able to think quickly under extreme pressure. Those are hard to test for (that is why they have field training programs).
As far as working in the jail goes, that is pretty much par for the course in any sheriff-type agency. If you don't want to work in the jail, try a PD. It is still a good way to get in the door. A lot of officers who work for us worked for SOs for a few years, got their commissions and then made the move to a PD. The jail experience is good for dealing with serious criminals, and gives them some insights that allows them to pick up on when someone is a carreer criminal that officers who haven't worked in a corrections setting wouldn't have.
Good luck, its tough work, but it can be a lot of fun, and when you go home each day, you know you did soemthing good.