I'm not going to do this justice, but to the best of my understanding, Ralph Davis imported a new morph that we now call the platinum/platty daddy. when he bred it to a normal female, he had an entire clutch of normal looking snakes and other offspring that strongly resembled the sire, but not exactly. these latter snakes he called lesser platinums. the normal-looking offspring from a full platinum male were 'het' for platinum/platty daddy. if you breed this normal-looking 'het' for platinum snake to virtually anything else in the BEL complex, you will produce the full 'platinum' version of that BEL morph. in this case, it's a butter daddy. but really the same thing in my opinion. it looks like the OP put a platinum to a lesser/butter and wound up with a mix of all three possible outcomes.
hope that made some sense. others have explained it far better in the past if you search some older threads.