Why were some applicants refused entry to the Thai Consulate in Vientiane despite having appointments?

My Experience in Vientiane: I was there a couple of days ago, with appointment and this is my first time that I ask for 60 days tourist visa, and everything work fine. In the firts I gone to Royal Thai Embassy, but they told me I had to go to the Royal Thai Consulate. When I was there, a lot of people stay in the gate, and at the gate they checking quikly my passport and my appointment and let me go inside. They don't let my Thai lady go inside Consulate with me, and she see on the gate that they refuse for some stranger to go inside for ask visa, despite they have regular appointment, sayed to them "go back your country" but she can't understand why. Somebody know the reason about that?