Glow says today is positive and yesterday negative... how?

Question

I have a feeling that the OPK reader on here is broken... or it just doesn’t like me. Thoughts?
UPDATE:
These are the ones from the 30th and 29th:

Answer

The test from today is negative. Yesterday’s looks more positive

Answer

It gets really wonky on me too sometimes, just use your own judgement

Answer

Yesterday’s was definitely positive

Answer

I don’t trust the app. I’m currently ovulating which my strip is a strong positive but app says it is a negative. The app lets you readjust the results so just use your best judgement! Seems like they were both negative to me, you may have ovulated on the 30th!

Answer

It didnt say mine was a strong  positive and it was def a strong positive and I we conceived the next day. that "negative "is def positive

Glow says today is positive and yesterday negative... how?

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