confused????

So I have used the clear blue ovulation tests this month and I got my first flashing smiley on 07/02 and then solid smiley on 09/10 BD'd all fertile window and a couple of times after. AF was due 23/02 and I'm usually like clockwork I've taken tests and they all show BFN - I also started a new ovulation app and when I put in my details of last period etc that app said I wasn't due until 27/02 - not sure what to think - can clear blue digital show solid smiley and you not ovulate? Also has anyone else had BFN's and then later got a BFP after AF DUE ? Any help would be great