This exact same debate has come up before. Link
At the time, the discussion was ended by the web site officials by saying that the "official" results are taken from the CSAC, end of story. We tried and tried to find these results on the web, but were unsuccessful (and, apparently, nobody that knew where to find them would fess up).
Now, the same thing has happened. i.e. a debate as to how the fight officially ended. As pointed out above, the NSAC scored it a TKO. MMAPlayground scored it as a Sub/Tap.
In the first instance, I had the chance to pick up 4 points, so I fought the result.
Now, using the NSAC results, I will lose 4 points.
I say change the scoring to TKO. I'll give up the 4 points for the sake of consistency.