Digital Ovulation Test Results

Day one-low fertility. Day two- peak fertility (however, it did not stay on the screen for 48 hrs) Days three through six- high fertility. I am unsure how to interpret these results. Shouldn’t the peak symbol have stayed on the test? Shouldn’t my fertility levels be going down by now? Do you think I got a false read on my first peak test and another one is coming in the next few days?