OPK confusion!

Sara • 1st baby due 7/31/19 ❤️

Hello ladies! Here are my OPK results. Sunday and Monday were my darkest positives. But I guess my question is, is it normal to be dark like that a couple days in a row? Glow has pushed my ovulation day back from yesterday to today because of my OPK results from just now. Help! ❤️❤️