F-1 visa concerns

After filling out my DS-160 form for an F-1 visa for the spring intake of 2024, I had to request a referral from my school to change my intended start date to the fall. This was necessary because the appointment date I was given was on July 15, 2024. As a result, my DS-160 form needs to be updated. Additionally, I no longer have access to the old DS-160 form I previously submitted. I also noticed that the admission letter I received has a different SEVIS number compared to the one I paid for. What should I do in this situation?