It's not exactly the same as the one of the photo don't worry ;) I take the picture from adafruit learning system.
Thanks for clarifying. It's been a couple of years since the new version came out. I didn't think any of our distributors had that much old stock on the shelves.
But anyhow, the two rows of holes are connected. Many people solder in headers to those holes for convenience.
Other unrelated side question, is there a way (using a module or not) to power arduino + ext power on the shield with the same power supply ?
That depends somewhat on your supply voltage:
If the supply is between 7 and 12v, you can use it to power both by connecting to the external power terminals and leaving the jumper in place.
If it is regulated
5v, you can connect to the external power terminals, remove the jumper and run a jumper from the positive power terminal direct to the 5v pin on the Arduino. :!: Be sure to get the polarity correct and be sure it is regulated
Other than that, separate supplies will be needed.