I've been trying to work with a new design for my RC, so this is my first fuselage sketch. I got to this point in the picture but for the life of me, if you noticed it, the front and the rear loft are not following the guide curve. If it did, it came out really strange looking. I've been trying to figure out what I did wrong with it and after a couple of days, I thought I better ask fellow SW expert for guidance.

All I want to do is to fill in all the loft guide line, so that it curved the way I sketched it.

Also, for the front and the end, I could never get it completely filled in. As soon as I choose the point for the front or at the back of the fuselage, the loft won't generate. Must be a writer's block and I'm sure there must be something really simple that I miss. Can anyone help with advise please? Greatly appreciate it.