This probably happened because you didn't put a delay between your bets. If the site says "dice is already rolling. are you playing from multiple locations?" or something like that, when you hit stop, it'll probably roll another few times because the script already sent the site the order to roll.
You can fix this setting a delay via de script (search for the word delay and change it) or in your account via just dice "When rolling, delay my results by ... seconds".
This was happening to me too, after changing the delay it's all good now.

And what happened to the pastebin of the script? I wanted to show my friend but it now says "This paste has been removed!"