What am I looking at???

Like I said in another post, this is my first time doing OPKs. Recently, had IUD removed but not actively trying to conceive right now. Really want to nail the rhythm method. (No pun intended lol). In addition to the OPKs, also tracking bbt and CM.

Just a few questions re: my recent OPKs. Any insight would be appreciated...

1. If I’m looking at the tests correctly, looks like I ovulated around CD13-CD15, right??

2. How accurate is Glow’s opk analysis?? It says today/CD19 that I’m getting close to ovulation. Weird.

3. Is it normal that my test lines aren’t drastically fading post-ovulation? I feel like they’re just slightly lighter than the control.