No matter what you were told Elliot, its seems actions are louder, Ohme only installed one charger.
If anyone told you differently on the phone, in all likely hood it woll be dismissed. If however you have written confirmation to have 2 chargers installed, that is a contract and they would have to honour that.
I dont know why you are stressing yourself out over it.
If needs be, just get another charger installed, even if you have to pay for it.
Common sense prevails, unless you are driving a couple of hundred miles per day, you wont need 2 chargers.