When I reply to an email thread, the message gets sent to myself if it's my second reply in a row. If the conversation thread goes like (person B)>me>B>me it works as it should, but if it's B>me>B>me>me the last "me" email will get sent to myself instead of to person B. If I want that email to go to person B too, I need to reply to his last message in the conversation, not just reply to the whole thread. Usually I don't notice when it happens and then keep wondering why people haven't received my message. This is silly functionality, there is never a time when I want to reply to a conversation and have that reply go to myself.