I have discussed all the intricate details with both Google Gemini and Grok, and they both found it to be incredible/unbelievable/impossible!!"
Because that will never likely happen unless there's a collision with the resulting binary seed from the jumbled and properly arranged mnemonic.
It's as if both you and 'Jack' have exactly the same 12 words in your mnemonic phrases, but just in a different order.
The mnemonic order 123456789101112 opens your private key.
Have you actually tested to create the wallet with the correct order of words and checked the addresses if they matched?
Or just assumed that it's the same wallet because it has transaction history?
Are you using a legit version of Electrum? With verified signatures from its developers.