| That depends on how you bulk, If you do whatever it takes to get to your daily caloric goal, such as by eating pizza and burgers, yeah you'll bulk up muscle but also fat. On the other hand, if you clean bulk, then you'll minimize the addition of fat, although it is still very difficult to put on 30lbs of muscle without putting on any fat. I'm not sure if its possible, it probably is but its just a matter of what you eat.
So as far as your cuts, they are there because of your low bodyfat %. If you clean bulk and keep that bodyfat % low, then your cuts will stay. | 
