Not sure why you have 2 different dates; it should be the same; however, it is unlikely you will be able to get any extension unless it is due to natural disaster or Covid. Also, we are able to schedule CCIE lab (see openings) 3-4 months ahead;
My guess you will end up renewing your CCIE (and/or CCNP) by taking exams or CEs or mix; see details at
https://www.cisco.com/c/en/us/training-events/training-certifications/recertification-policy.html#~requirements
CLN , https://learningnetwork.cisco.com/s/ is the place to report /confirm/ consult regarding this issue, and other cert issues.
Regards, ML
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