Are you waiting for him to wake up and bark before coming down to him? This can mean that by the time he's woken you, and been outside, he's thoroughly awake and wanting to play - quite normal.
We found the trick is to get to them before they wake up. Set your alarm for 15 mins or so before you'd expect him to wake, then you can shuffle him out and get him back to sleep more easily. This works particularly well for the middle of the night calls.
That said, our boy was just like yours and once he was up at 5.30 ish he was just too restless to go back to bed. I solved it by taking him to sleep on the sofa with me until the kids got up at 7.15am. He was 6 months before he could sleep later 6.30am so the sofa ritual continued til he was too big to fit properly!!
For the first few months I felt like a sleep deprived new parent. We had to go to bed early to compensate and would take it in turns to get up to him. It's a comparitively short period of time but the first few months genuinely felt like years. I used to have an afternoon sleep as well...
Kindness is the language which the deaf can hear and the blind can see ~Mark Twain