Yes there is. The first one you see and the seconds one is down in the neck in which you will feel open when you slowly stick the nozzle in. It basically looks like this inside, but the second flap(valve) is further down.
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This is also why you got this little device with your Ram for when you have to fill your truck up using a gas can. It ensures you pass through and open that second flap.
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Although, like Twillaims said, it might be best to not stick the nozzle in all the way because you are completely covering that second flap hole with the nozzle. This cause the back pressure valve in the nozzle to trip and shut it off. Leaving some room in that second flap where the nozzle is completely covering it might be enough for the back pressure to escape without setting off the valve.
The best way I can explain it is like when you use a funnel to fill your oil. If the funnel is pushed all the way in and completely fills the filler neck then the oil will fill slowly. However, if the funnel tilted just a bit so it doesn't completely fill the hole to let the back pressure inside escape, the the oil goes down quicker. I know it is a poor analogy, but it is the best way I can explain it.