MLB is investigating the Turner incident. Evidently MLB security asked Turner to leave when he returned to the celebration, and he refused. The Dodgers evidently assumed he was cleared from a previous day's inconclusive test, and could come back on the field. Who knew what when, and how he got it in the first place...assuming the test isn't a false positive, which it may well be, is something they're going to have to deal with.
And Turner has to face consequences, even if he doesn't have it. He seemingly disobeyed the standing orders, and that has to be punished.