The landlord probablyasked for another $100 to cover the additional cost of utilitis which are often included with the lease. They probably refused a small increase in rent to cover new landlord expenses.
People ARE named on the lease along with pets.
There is a security deposit for damage control especially from pets.
Many renters start out as two and often would stuff another four in there without a specified lease.
That IMO is what happened.
I’m a landlord in GA, not there, but the laws are different in every state. If you are really in CA, you just don’t know.
That being said, I make them list every person, they will, but invariably move someone else in. I have to evict the person once they’re in. That’s it, bottom line.