it sounds like you are doing a lot of shoulder work.
i would seperate these two, so that you can better focus on each muscle group individually and work it more thoroughly.
i think that a good back day would look like: pullups, lat pulldowns, any kind of rows and deadlifts or do back extensions. i like to do deadlifts and later do back extensions. i use a nice machine that seats you up at an angle where you are seatbelted in, then you just straighten out your back working against the weight of the stack. they are great for isolating the lower back, i call it the "Loin."
i think the back extensions might be one of the most overlooked excersizes out there, i do them because i have not found anything that can isolate my lower back so well, and that is an important area that you do not want to overlook.
you should also try delt flies, these are one of my favorites and again do lots of isolated work.
do the shoulder presses and front and lateral raises on a different day, on their own, along with some shugs.