Is it possible to get rescinded from UCSD over this?

Hello, so when I applied to my UC schools in November, I stated on my UC application that I was going to have to drop a class (Principles of Engineering which was an elective course) to take a graduation required class (government). Right before the second semester started in January, my counselor found a way to fit Principles of Engineering back into my schedule. I did email UCSD in January and they told me to email docs@applyUCsupport.net about my schedule update. As a result, I informed docs@applyUCsupport.net, and they added it to my application. However, recently I forgot to inform UCSD about my change of schedule after receiving my admissions offer (basically adding a class that I said I dropped). Is it possible to get rescinded over this? I have evidence that I sent it to docs@applyUCsupport.net back in January by emailing a representative to help me double check and confirm that they attached my documents to my UC application.

http://admission.universityofcalifornia.edu/how-to-apply/after-you-apply/

“If you receive an offer of admission, be sure to confirm with the campus admission office that they are aware of the deficient grade or schedule changes. Although you must notify the campus of these changes, we cannot guarantee that a campus can go back to review an application after correspondence has been received. Make sure to save a copy of your correspondence just in case.”

Kinda scared because I haven’t SIRed yet. Also, I emailed UCSD 3 days ago (no reply yet) and I called them everyday (they don’t pick up…?).