issues with glow

Memnoch

Ok. so wondering if something is malfunctioning here. glow says my period was due to start saturday. It's late and hasn't shown up yet. I keep editing that in the log and saving it but every time I get back into the log it shows that it says my period is happening and it's not and I've repeatedly edited it and saved it. Why is it showing this instead of that my period is late?