It'll often be easier with those girls, as their schedules are all in one place and being handled by one person. If you want to book a duo with an Indy or a girl from a different agency, it might be a little different though, and it really will depend on who all is involved.

double bookings

of course not..that is why they are there..if the girls are both available..they can surely schedule it for you..double the pleasure..double the fun.