Superfictious have you ever checked out this article here; http://www.beardeddragon.org/articles/sexing/
Your pic's are kind of blurry on the tail side of the vent making it hard to say for sure, but if you
say that there is only one lump in the center then it is a female.
My sister raised and sold bearded dragons. If you take the tail and lift it up and back as far as you can then you will be able to tell. On your secound picture it looks like there are two balls. If that is the case then you have a male. The female's don't have anything. All the other pictures look like nothing but the second one really looks like it could be male.
A male will have several "pre anal" bumps that go down the sides of the legs. So if there are obvious raised bumps that are right before the vent and run down the legs you have a male. If no bumps then Female. Also by lifting the tail is a hard way to tell, only because if you dont have one or the other to compair it can be hard if you dont know what your looking for, but the female opening is smaller than the male opening. You can also hurt your dragon if this is not done properly so I dont recomend this.
This is a male showing the femoral pores. They are very obvious by 1 year old. It looks like your Dragon is smooth from your pictures no obvious bumps like this, so I think you have a female