Regardless of whether you pass or fail them, they will be called in again. So don't worry about failing them, you'll get that call again soon enough.
You'll know if you've passed or failed because the green marker will be dimmed or lit depending on the circumstances.
I'm not sure man...I'm kind of in the same boat. I'm at 100 out of 104...I know I failed 2 of them and I haven't had any calls in a long time after completing the game. I started a new game, think I'm just going to go through it that way...
That's not to say it won't come up for you, but I'm not sure.