Moving a show WAY later in the block in the middle of its run, like 2 hours later, isn't out of the realm of possibility. That happened with Tenchi Muyo GXP, which was moved to 3 AM, because DeMarco and friends severely misunderstood what kind of show it was when they accepted it, and realized "oh crap we gotta do something NOW". Of course, in the revived Toonami block, that is so far the ONLY time that's happened.
.... Wouldn't it be HILARIOUS if it turns out the July 4th marathon got BETTER ratings than the usual schedule lately!??