Every time I go and park my car for the girl npc to get in it for the mission, she never enters it and instead enters everyone elses. This continually happens. Can anyone shed some light on this? Thanks so much!  

I got no Idea were you are talking about..  

I know I think it's only happening to me. The npcs that I'm supposed to bring to the location they tell me just refuse to enter my car, and I don't know why.  

Make sure you are beside the right building. Switch to the other building if it's not working.  

Where's the second building? All I know of is the one near the auction house.  

Mercy west hospital. The 2nd door on the right. They're connected as 1 building, but considered as 2 different "buildings"/places.  

yah this happens to me to if 2 player go to pick the npc in the same time  

Yeah the ones at mercy west refuse to work for me, I've tried everything including honking constantly. Isn't there another car mission npc that's a guy that shouts his requests like "to evades hat shop now now!!!" if so where is he located?