The way you programmed the CBFM is okay. Even if you think it is off by one day, it really shouldn't matter so long as it tells you when you are fertile. I would have started on the day that you did, since you need to start CD 1 within your testing window.
I would def test again in a couple days if AF hasn't shown up. If AF is due 10 days after Oing, that doesn't mean you cannot get preg this cycle. You can O late or early anytime really...so maybe this cycle you just O'd later than usual and might have a longer cycle. I have heard and read that your LP doesn't change, only when you O.
Best of luck!!! Keep us all posted when you test again!
