He sounds extremely normal to me! My DS2 who is 14 months old has thrown tantrums from a very early age. He's getting better as he gets older because he understands more now. I bet your DS doesn't want a cuddle after his bottle any more because he'd rather play . Arm flapping sounds pretty normal and my DS2 sometimes doesn't respond to his name either if he is busy playing and not concentrating on me, he can't do two things at once (typical male LOL).

I really don't think you have anything to worry about .