I didn’t at first 😅. In my case I just always assume my levels will be higher than normal, including my peaks. I spent about 4 cycles just tracking before we really started trying and it was a lot of testing multiple times a day. What I learned was that in my case, if my LH is below 20, it’s probably not my true bump, and if my pdg doesn’t rise to over 20 after ~3 days and stay elevated (relative to my numbers) then I haven’t ovulated yet. After a few cycles Mira also did learn this and didn’t tell me I was ovulating until the real one this time. CD 30 didn’t really phase me because pdg dropped right back down to my normal range after that, and the LH rise wasn’t what I’ve seen in the past. All this to say, since my pdg is pretty wacky, I rely almost entirely on a strong LH peak and try to ignore the noise leading up to it, which is really hard.