Right so I have not explained it correctly actually. The original NFT, minted by the creator from the creator address on the native chain, will always continue to exist but will be locked on the bridge when it’s moved across to another chain. A new version of it will then be minted on the new chain where the meta data is copied across and a proof of authenticity tag will be included to refer back to the locked original. This new version on the new chain can then be treated or traded as usual backed by the locked original.
The new NFT can also be moved between chains, but it won’t be locked like the original and cannot be recovered. Only 1 copy will ever be in existence in addition to the original. So the first bridge, is lock and mint. Any subsequent 2nd or 3rd bridge is burn and mint. If the owner of the copy would want to move back to the original chain, you can do so and the copy is then burned and the original unlocked.
The creator account question I need to check with the devs if that’s a unique Messina creator account, or if there is some other solution where there is different creator accounts. My assumption is there will be 1 unique creator account operated by the bridge.
I don’t fully understand your question about losing the ASA ID and creator account.