10-1 was suppose to be AF

Katelyn • I am 26 years old and have 2 children....ready for baby #3!
I was "suppose" to start on the first of October...according to glow...but that didn't happen so I deleted that period and it changed it to 10-6.... Glow confuses me!!! I've been tracking for 5 months now and I feel like I really never know when AF is coming...which then I never know if I'm "late" !!!  Anyone else struggle with   This?