Am not sure what you mean, make sure to read the comments in the template, to understand how the controls work in THNK.
I can't tell, it could be anything, maybe you didn't add the new events for the new player, maybe you didn't add sync behavior to the new player, maybe.
It could be anything, so like I mentioned before, read all the comments i wrote in the events, and learn how everything works, then add the new player and its events.