Sarah, I used to get this sometimes when I was using Maybe Baby. I found it very confusing to be honest. If I hadn't been using the peesticks at the same time I would not really have known what to think. I found the combination of peestick and MB was useful. When the two coincided, it was D Day. Any time after D Day, I just disregarded. It is interesting though how there is so much variation in a normal cycle.