I don't understand...

Ok this is confusing I had my AF on July 1 for 5 days. Originally it had my fertile time starting today. I entered an opk in on Tuesday saying neg then the past 2 days were entered as high (with the clear blue easy digital) had the blinking face. 
After that it changed my fere start day to July 6 (the day after my period) and moved my period up to the 25th making my cycle only 24 days (my cycles are never that short. Also I have no ov symptoms at all no cm nothing. Now I feel like the calander is way off. Any thoughts?