they took me to secondary inspection office for further questioning. it seemed like no one knows much about TPS' advance parole because everyone i had to talk to in Nepal's immigration office, (didn't have much of an issue at my transit) and here in US didn't know what i was referring to. They took my docs and checked things in their computer, asked a bunch of questions, and then the person in-charge of my case went inside and talked to somebody else, and then finally they stamped my AP.