Okay...
If you noticed Watery or EWCM at all at any point in those days, you should mark that day as such. You want to mark the MOST fertile CM you find that day, kwim?
As for temps... that's a toughie. I can see how FF might think that CD 11 was the O day dip, ya know? It's not uncommon to have a temp fall back before going back up... so unfortunately, we'll just have to wait and see what tomorrow brings.
I would keep BD'ing just to be sure. Best of Luck & Baby