What should I know about the immigration process for DTV holders during border runs in Thailand?

Just thought I'd let everyone know about my border run experience. I got my DTV in August and did my 90-day report a few days early. i left Thailand a week before my 180-day mark, stayed out of the country for about 2 weeks and then came back to Don Meuang airport.

I paid for fast track service and when i got to the counter, the female immigration officer took one look at the DTV sticker in my passport and called over another female officer and showed the sticker to her. They talked for a minute and then the other officer asked me to come with her.

I followed her to a male officer who looked at my passport. They talked for a minute. Then the female led me to a desk with computers on it and asked me to sit down. She checked something on the computer and then asked me "what kind of DTV is this?". I told her "for work". She said "ok" and then checked something else on the computer. Then she stamped my passport and said "ok, finished" and motioned for me to leave. I wanted to ask her what that was all about but I didn't want to risk anything and I just wanted to get out of there. I left and went to my condo.

Everyone was nice and polite the entire time.

I have no clue what happened.