I've been using FF for 2 years. Usually have a dip in temperature on the day of ovulation on the day after a positive Opk. FF originally put my ov date as Cd13 then took it out as my temp dropped cd14. I can't work out when I ovulated, going by past charts I'd say cd14 but not sure why FF isn't logging it. Weirdly I had slight spotting on cd17 but only slight pink when I wiped. I was rubbish at taking my temp earlier in my cycle this month so I wonder if that has thrown it.
Anyone got any idea?