When did I conceive?

Kim • mom of two girls. 10/1/2011& 06/05/2018

I’m so confused. And I should know this but I need some advice or suggestions. So my last period was July 15-19,2024. And I tested positive on August 17,2024. These conception calculators say I should have probably conceived around July 25th. Is that roughly accurate? But on this particular pic it say my period should have been the 8th of Augment and it should have been August 12. Also my periods are usually 23-24 days. It used to be 28 but after my second kid it went to 23-24. Any suggestions would be great!!!