Well that test was unrelated. They only reason they tried that with an ocean landing was because they wanted the barge for the FH demo flight.
This should have been a 1-3-1 style landing burn where it lights up one engine, then 2 more to slow it down, then drops down to just 1 again at the end. In this case it sounds like the the outer 2 engines didn't start up right, so it came in way too hot.
They also have said that the center core of FH is basically a new design from the ground up, so it makes sense that they had some problems on it's first landing.
