Glow Period Tracker Need Help

Jessica • Hi! I`m a 31 female been for 8 years. We are trying to start a family because we have a lot of love to give.
So I started my Af on the 9th of October and I had a very light af this month. I only spotted a few times which is normal because I have pcos. How can I get my glow tracker to show that started my af on the 9th and, stopped on the 10th? I can't get the arrow to pull back to the 10 th. Thanks!