glow did a weird worrying thing!!

Chazi

so..today i deleted a period from the log by mistake (my last period from the 24th to the 28th of October) and when i entered it again glow suddenly changed the days of my fertile window which before this mistake was from the 3rd to the 10th of November. and now it looks like i totally missed the days and im out for this month...:(

Af was supposed to arrive today but no sign yet.

Why this happened???