Obviously if it were the Lakers picking at #1, it would have been fixed. So the NBA decided to fix it such that it wouldn't look so suspiciously fixed, dropping the Lakers down to #3. But then the NBA decided that this second fix would look suspiciously fixed, dropping the Lakers to #3, so they raised the Lakers to #2.
Thus if the Lakers had gotten the 1st pick, the second pick, or the third pick, we'd know that the draft lottery had been fixed.
Then again, if the Lakers had totally dropped out of the top 3, it would have been completely obvious that they were fixing it to make it look less likely that the fix was in.
We need to cover all possibilities, since these are such dirty fixers.
/sarcasm off