You're not the sharpest twig on the tree so ill explain...
There are no singles sticks because the net is setup for singles and therefore the ball is considered good when it struck the net post.
1) Look for singles sticks (none present)
2) Look at net post location (singles sticks not needed)
3) If you saw either of those you could have answered your own question, but you didnt because you were so much in a hurry to prove me wrong.