Read the rule. There’s no requirement in an interference call that you tag the base if you’re being interfered with.
Fred, the determination on that first out was over when contact was made. The short stop had already missed the bag going by, and was then setting up to convert a double play attempt.
The runner did not prevent that first out from being made.
It could be assumed the runner did something to break up the throw to first base, and that runner could be called. Two never would in this instance unless the runner had caused the short stop to miss the tag of second base. He didn’t.