Longer cycle in glow this month?

Bre • 28 TTC for #2 with my best friend and love of my life.
I have had 22-23 day cycles then past 3 months. When I set glow up I put I had 24 day cycles. This month glow had me at a 25 day cycle...I'm on cycle day 23 now, why would glow give me 25 days this month. I usually would have AF yesterday or today. So confused????