Messages and iMessages not syncing

I have been texting a few people and have noticed that iMessage on my macbook pro (10.8.4) isn't syncing with messages from iOS7.

To be more specific.

I get the receivers message both on the phone and on the computer. I can see when they type on both as well. This is fine.

What is missing is if i type a message on the phone it doesn't show on the computer and vice versa.

Anyone experiencing this issue?