Delta will not be interviewing next month. As far as the "fix it" emails please update your application ASAP. The biggest reason for the emails is due to gaps in education or employment. They want your entire history even if it spans 25 years ago. For military pilots break down each assignment on your application.
Make sure you will out every box on the application. If it does not apply to you put a "N/A" in the box. Check your "Maiden Name", "Aliases", and "Other Languages" boxes. If it doesn't apply to you put "N/A" in the box.
The last thing that people are screwing up is the spelling of the company. It is DELTA AIR LINES, three words. Check your letters of recommendation and referrals for the correct spelling.