Day 1 didn't change

Joy • Sun, Aug 30

I did <a href="https://glowing.com/glow-fertility-program">iui</a> this cycle and my period came a day later than the app predicted. When I either put spotting or nothing in the day glow thinks is day 1, it doesn't change my actual day 1 to say day 1. I even restarted my phone. How can I fix that? Or do I need to change my status!