Arms growing at faster rate than Pecs. Could this be wrong bench form?

I started working out a couple months ago and i've noticed my arms seem to getting bigger than my pecs. I only do Bench press, Military press, Squats, Deadlifts, pull ups, and calf raises. Is it normal or could I be doing something wrong where my press targets my biceps and triceps more? Should I be doing more pec workouts?