On my 07 2350, when 12 vdc isolation switch below kitchen cabinet is on, the 110v outlets are energized no matter if inverter remote switch is in auto remote or 12v charge position is this the same as others? I have nothing from PC to explain this system.
I assume you are not plugged into a 110V source, and your generator is not running. You are operating off your house batteries. I also assume a previous owner did not rewire things.
I just might be able to help you as I also have a 2007 2350. But before I start typing a lot here, please read through my article here.
http://forum.phoenixusarv.com/index.php/topic,73.0.htmlWe exclusively boondock. After making the change I describe in that post, I control my Tripp-Lite inverter power exclusively by utilizing the switch on the inverter itself. Doing so assures me that it is 100% turned-off when I want it dead. When it's dead, I still have 12V battery power. I turn the inverter on only when I want 110V power. I NEVER use stand-by mode because I can't predict it's behavior. I concluded, stand-by mode is NOT for boondocking. It is for people who drive from one RV park to another, always plugging in at their destinations. You will boondock fine in stand-by mode overnight, but not for an entire weekend.
The power switch is the little black horizontal switch seen in the upper right-hand area, just to the right of the blue cable plug. It is a 3 position switch. I forget which position is 100% off, Power On, and Stand-By. The black label below it will tell you.

I need to mention that there is "value" in stand-by mode for some people. One application is your TV which requires 110V to retain it's preset functionality. It is nice to be able to go out for the day in your motor home, come back to your camp site, and have your TV settings retained.
By The Way, while on a trip, you NEVER want to kill the power with that switch by the main entry door because you kill 100% 12V power including the required 12V to keep your fridge operating on propane.
Again reiterating that I assume the previous owner(s) did not modify the effected systems we are discussing.