Hi,
Unbalanced is simply a term used to describe those who only exercise certain parts of the body. You've probably seen them, for example guys with big arms/chest and skinny chicken-legs
To look balanced and even, you should exercise every bodypart, it's not more complicated than that.
Those exercises you mentioned will work the biceps, triceps, and shoulders/chest to some extent.
You should also do some exercises for your legs and back. Good leg exercises include squats, legpresses and leg extensions for example. A couple of back exercises worth mentioning are pull-ups/pull-downs and rowing.
Although you already do lateral flys, I think you should add atleast one more shoulder exercise, for example the military press. A presume the "Laying-down fly" works your chest. I would also add benchpresses or dumbell presses.
Once you do 2-3 exercises per body-part, the risk of getting unbalanced/uneven is dramatically reduced.
Have fun!