Wrong O date predicted...how do I correct?

Glow thinks my period is expected today, but I think I O'd on Sept 8th. I have no signs of AF and my temp was still high today (98.33). I'm still hoping it stays high. Glow started a new chart for me today thinking my period is starting, which stinks because I'm in the TWW. Can I change the settings (change the O date?) in order to continue to track my temps on the same chart?

Does this make sense? TIA!