Thank you very much for playing and your kind words! :-)
Actually you can't stack the dice values, the second die just replaces the value from the first one ^^'
And since the text is prefilled with a placeholder it looks like there are values already.
If I had had the time I would have changed a couple of things and added some clarifications.
I've found the origin of the stacking bug but I don't know if I'm allowed to fix that during the rating period.
I think you should feel totally free to handle that bug if you want ☺️