I'm still a bit unclear. I used a scrambled, incorrect mnemonic phrase from that Facebook phishing scam, and it successfully imported into Electrum wallet using the [BIP-39] format option. However, when I tried to import it into other mainstream wallets using their BIP-39 format, they all failed!
Furthermore, the wallet address that Electrum opened after successfully importing it with the BIP-39 format option was not a newly created Electrum wallet. Instead, it was an address that someone else had been using for several years, and it even had usage records from just the past few days.
This means I inadvertently opened someone else's actively used Bitcoin wallet with a completely random and scrambled mnemonic phrase, and I can now directly control that Bitcoin wallet...
This scrambled, incorrect mnemonic phrase consists of the exact same 12 words as the phishing scam's mnemonic on Facebook, just in a completely different order. Yet, it somehow opened a third party's Bitcoin wallet..."