I found a provider that I liked. I called her on a Sunday and asked her if she was available on Saturday thinking that she would need sometime for scheduling and background checks etc and she says. Next Saturday? Call me next Saturday a couple of hours before you want to start. Did I do something wrong? Did I make an appointment and not know it? We never talked about a time and she seemed a little annoyed that I called her so early. Am I missing some thing?

...who doesn't screen very well (or at all).  Ususally, the more time they have to screen you the better.

Some providers don't like to book far in advance because it's more likely the guys will be no-shows.  But they still should screen you and ask you to confirm a couple days before the date as well as the same day.

Instead of calling her, maybe you should have contacted her by email.  Then she could have responded at her convenience.  If she didn't respond until the day of the appointment then she's an idiot and you should forget about her.

And stay away from Backpage!

...of asking if she was "available on Saturday," you should have asked if you could see her on Saturday at X o'clock for Y hours.

Good advice Papasan.  Always be specific when contacting providers.

There was a massage provider in my area that operated that way. If you tried to set something up ahead of time, she would say the same thing. If you caught her an hour or two beforehand, you could get a date

when gals did no screening or scheduling.  The phone would ring and they'd tell the guy to call back from a certain phone booth (Visible from their apartment window, usually.)  When you got there and called, they'd give you the address and apartment number.

It's not a good sign, and I would pass on this one.

I like to schedule at least a week in advance myself.

mention sex or specific services or money in your request to see her. It is not acceptable to say "I am willing to pay you $200 (discounted rate) for a BBBJ if you can see me for an hour on Saturday at noon."

..in advance.  I have gentlemen who have arranged dates with me through the Christmas season.  

"advance screening" and give a date I had in mind and the length of time (1 hour) and a time suggestion like 1PM but have some schedule flexibility.  In most advance screenings, I've ended up meeting her sooner.

They shut off their phone or stop taking calls until they are available again.  And they tell every caller to come to the call point.  Of course, I live away from the big city & there's no way I'd hang around to see if a gal might decide to start taking calls again.  So if there's any sign of this, I scratch them from my 'to do' list.
It's not my job to run their affairs.  But it my job to decide who I will see.  And I need an appointment as it takes me a hour to reach the city