1 OPK positive, 1 OPK negative

I have a very irregular cycle and have been off BC for about 4 months. This is my first month using an opk to TTC, and I’m so confused. It was about to be ovulation day according to Glow’s predictions (not sure I trust them since my cycle isn’t average length), and I had been using the digital test with “NO -“ glaring back at me every day. Then I bought Equate brand and yesterday was positive, while digital was negative. Today, same thing - one pos, one negative. Yesterday I had EWCM and today is ovulation day according to Glow, but I’m stumped at why the tests are contradicting each other.