Going on HT run questions

I've always thought that part was obvious. It's in every guide out there, you'd figure people would at least try to look up a guide at the very least before attempting to HT.

"2) From this outer part you can get into the inner one in one of two ways. The first is to do HTPQ, which involves getting six people and doing a short PQ. The second is going in a party led by someone who has a Certificate of the Dragon Squad, which allows him to speak to an NPC to warp he entire party directly to the inner lobby."

that part, i've never encountered it before, do i need the 6 people in HT cave for that?

i've never HT'd before, every time i enter the cave after the potion there's just two NPC's, and one says "no" or whatever, and i can't advance further. i always assummed this is where the glitch starts.