Normal
They did make a mistake, what they do about it is another thing, you might check into it with your travel agent to prevent any problems. A simple fix is to switch so that on paper there is one adult and one teen in each of the cabins, when on board go back to your original plan, it is done all the time and what is important is that it gets an adult in each cabin.Adding another person should not be a problem as long as you are outside of final payment, once final is made things can get tougher, again here is a job for your TA.
They did make a mistake, what they do about it is another thing, you might check into it with your travel agent to prevent any problems. A simple fix is to switch so that on paper there is one adult and one teen in each of the cabins, when on board go back to your original plan, it is done all the time and what is important is that it gets an adult in each cabin.
Adding another person should not be a problem as long as you are outside of final payment, once final is made things can get tougher, again here is a job for your TA.