Confusing conversations and WHY AM I REPLYING BACK TO MYSELF?
What happened? All of a sudden the conversations are super confusing. I've got things below and above. I reply on my phone and then come to see I have a "new" email on my computer but its not new its been replied to. I would know that because I just spent 10 mins searching for new content... (Please don't respond with "well the system hadn't updated yet." That is not the issue I am complaining about, the issue is the confusing set up...)
Another thing... if you are going to have a "feature" (cough cough mistake cough, excuse me. I had a little sarcasm stuck in my throat ) of replying to myself instead of the much more likely event of sending additional content to the other party; please have a warning window pop up that informs me that I am about to send something to my own email and ask if I would like to proceed making a fool out of myself or would I rather change the intended recipient to the other parties email.
(PS if you solve your problem with my idea, I am paying off student loans and would like to be compensated for my input! ;P )

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Michael Bennett commented
i get the same problem with reply all, only on the mobile app. It sends a copy to myself which it never used to. I've set a non-yahoo From address under "Default sending address" in settings, perhaps that is related to the problem.
This worked right for decades, but has been broken for the last couple years and is annoying. It still works correctly on the web browser app.