I'm glad I didn't stop surfing this site after I got approve. I was informed that on certain District, before you can visit them, you need to have INFOPASS. And the picture needed is different from what is described on the Approval letter. Instead of the 3/4 facing, it should be full frontal.
Anyway, I got my infopass for Aug 8 at 10:15 am. I went to the district at 9:50 on Aug 8, with the Infopass appointment and got directed to the second window which does not have any queue. The walk-ins were on different window. The person in the counter scan my infopass and check my full front 2 pictures. She gave me waiting number 18, then directed me to another room. In that room, there were 2 windows open, one with number 17 another with 665. I was called to the first one after 5 minutes. Asked for the papers, including EAD and Advance Parole (gave them only the latest), stamped my passport, gave my signature and fingerprint, and done. Went home. That was easy.
The infopass really helped. I used to go to the district at 5:30 in the morning just to get ahead in the line. But with infopass, no more early mornings and no more too much waiting.