Right. And so why are you asking me to explain Matthew 12 to you?
I'm not. Matthew 12 doesn't know anything about when Satan was bound [which is the question you can't answer]
You can torture Matthew 12, stretch and twist its sinews, dump it in boiling water, and beat it with lashes, but it can't answer that question because it knows nothing about Satan's binding and/or the Millenium.
So why do you pretend that it does???