"Also this is why your base runner just stood on home plate instead of running through it."
There's no excuse for a base runner to stand inches from home plate and wait to be tagged. It would never happen. That's exactly what a glitch is. Regardless of whether leaving early triggered this or not, if a certain action by a user triggers the game to perform an unrealistic animation or sequence then that is a glitch.
I've left early from 3rd plenty of times and the CPU just throws back to 3rd for the easy double up, like they do on all other plays when you tag early. Regardless of whether a runner leaves early or not, in real life or on the Show, the fielder always throws back to runner's starting base. Very seldom will you see the fielder physically tag the runner that left too early. It never happens because during the play it's highly unlikely any of the fielders involved would actually know that the runner left early. That's why 99% of double up plays are appealed by the defense, which results in simply tagging the base.
The AI in the Show knows when you leave early, hence the immediate throw to the runner's starting bag EVERY time you leave early. This guy can actually make the argument that he didn't leave early because the AI always throws back to runner's starting base.
Maybe it was poor base running, but it's still a glitch.