Thanks for checking out my game! :-)
I just double checked but splitting the dice again should resolve in the two same numbers. For example if you put a die with a 4 on a die with a 6 and you split the stack you'll get a die with 4 and a die with 6. The value shouldn't change after the initial roll since the function is only called once.
The text stays the same even after removing the die and will only change again if you assign another die to that slot. That's total unintentional of course but I didn't had the time to fix that. Fortunately you can't mess up the starting stats if there is a die in every slot since the last die value in a slot counts :-)
But I'm happy you we're able to enjoy my game nevertheless! :-)