"59 km seperation of debris fields possibly suggests aerial breakup into 2 components."
If it were on solid ground, maybe... but you have to take ocean currents into the consideration here. On top of that, there's no confirmation yet that the two debris fields are related
Not likely to be the case, currents are likely to be uniform over several 10's of miles so if debris went in over an area of a few miles they would stay that way for some time. Even if they happened to fall at a boundary between 2 oceanic currents the drift would only be a Knt or two, insignificant over a few hours. A few exceptions of course but I don’t think there would be any in this area.