None of that means the "probe" wasn't intended to destroy mankind. Its mission was a failure, that much every Xindi agrees on. But none of them directly refer to it as a test; it's only the "Proving Ground" hardware that is being used for test purposes.
What qualifies as a "probe" in the Trek universe is really ambiguous. An apparent piloted mission to explore Saturn was a "probe"; an uncrewed mission across the galaxy was a "probe"; a space Nazi nuclear missile was a "probe"; use of sensors is called a "probe"...
Memory Alpha seems to take the Future Guy at face value about the nature of the first Xindi attack. But haven't we learned better than to trust the Guy? Especially when he appears to be related to the very enemy that launched the attack..