Turning off conversation view does not correct this. If you send from your Gmail account or any alias on that Gmail account, to any email address that comes into the email box on the same Gmail account you composed and sent the email from, then it will be treated like one email and you will not be able to delete the sent email separately from the received email because they are actually the same email.
I was hoping to send myself little reminders that I can then search in Gmail and just have them go strait to an archive or label without cluttering the sent bucket. I am going to try sending to myself from a webform on my server, and if that works, I will then send reminders from there and probably create an API to do so. Handy to send myself a calendar, meeting, map, or anything I want easy access to without jumping between apps or rebuilding search, tag, filtering or other features that are in Gmail.