Update to my concern, original post here: http://www.flyertalk.com/forum/26671582-post35.html

I went in 30 minutes early for the interview. Checked in, sat down, and officer came out within 5 minutes and told me to follow him.

Went into the interview room, he asked for my conditional approval letter, passport and DL. He started punching away at the keyboard, explained a few things to me, and then asked me if I have been arrested. I told him yes, but not convicted. He stopped typing and looked up from his screen and asked for what, told him I was underage in a bar, asked when it happened, told him 2004 when I was 19 and he chuckled and went back to typing. Officer wasn't very talkative. Across the hall there was a mom and her daughter and they were chatting it like crazy with the officer.

Did fingerprints, photo and he was typing away at his computer and telling me I'll get the email either later today or tomorrow. Literally right after he finished saying that, I got the email on my phone and was approved.

Simple. Don't know why I didn't do this earlier!