OPK & Glow app questions

Hi ladies! First of all, baby dust to all of those TTC and congratulations to those who have been successful this year!

I'm on month 6 TTC and have decided to use Clearblue Digital opk for the first time. Before that, I'd been using the app and was successful one month (unfortunately a chemical pregnancy) so it seemed pretty accurate. However my October cycle was longer than usual (50 days probably due to stress) but the app didn't update any of my fertile windows so we're trying to figure out when it is using opk.

I'm updating daily with my opk results (been on high for 6 days now...) but the app still isn't updating my future fertile windows. Has anyone else had issues with this and does it fix itself after some time?

Also do you have any recommendations on OPKs? I've heard that it can be difficult getting peak on CB and don't want to miss the opportunity!

Happy New Year to all of you. Let's pray 2018 brings us all the BFP we've been waiting for!