Luteal Phase Lengtn

Ok..I've posted a few questions now so  sorry this is getting super repetitive. I've read that a women's luteal phase can only be 12-14 days...sometimes up to 16 days if extreme. I used Clearblue digital ovulation tests and got my peak on Dec 8. That would mean I would ovulate within 36 hours of that. Well...it is 20-22 dpo. Still no AF and all BFN. My cycles are pretty irregular but recently they have been 32-33 days... isn't this supposed to be a pretty straight amount of time for this phase? If AF is late, does that mean I ovulated "late" too? Aren't Clearblue digital VERY accurate? I should also mention that the Clearblue test was the one I used last month too with remaining sticks...I didn't read that it had to be a NEW digital reader each time...if that even matters. Thanks!!