Just went to ring clearblue customer care but they shut at 3 grrr.
In summary: day 1 of testing (cd6) on advanced digi I got a blank circle
Cd 7 - 10 flashing circles
Cd 11-13 (today is 13) fixed
Today as intended, the fixed disappeared but I decided to test again thinking it would be back to blank circle, ie ovulation has taken place.
But quickly the fixed reappeared and on inspection of the test lines, the result line is Wayyy darker (darkest its ever been) of control line.
What's going on?! 4 days of highs 4 days of fixed?!