Stopped at 19?
That‘s very odd. I was told (for infantry candidates) that they look closely at the physical fitness portion of your application and that it factors heavily into who gets selected ahead of who.
I was told that 30-40 pushups and ditto on the situps would be considered "good" numbers for infantry candidates. The first test I did, there was a guy who was at the minimum level of everything, he was going reserve infantry, and was told he would need to improve and be retested.
Of course I‘m not a recruiter, so I don‘t really know how much PT factors into the selection process, but I WAS TOLD... that it‘s a pretty significant factor.
Perhaps it‘s only combat arms candidates who need to compete in the PT area, but it seems weird that you would be stopped at 19.
Unless you were sketchy on the form and they felt like being nice and passing you, but not giving you the opportunity to do extra "borderline" pushups.
Anyway, thats not to say its what happened, just speculation.
Maybe you should call in and ask if the PT results are competetive in terms of the selection process, and if they are, then tell them you were stopped at 19 and that you know you can do more and would like to be retested.