Its all very warming up with a light weight, but it needs to be enough to stimulate your cns and prepare your muscle for the sets ahead.
I personally would drop the chest machine press and add incline b.bell and also increase your sets to 4 on this.
You should include deadlifts in your back routine!
Try free b.bell squats instead of smiths machine.
I would not train biceps before my chest and definately not train legs with back.