Sorry Matt3o, but you forfeited rights when you turned them over to massdrop. They have a well established history of using whatever designs and IP they can get their hands on in any way they feel fit. I recall you having previous issues with them as well, running additional drops without asking, sending designs around, making agreements fast and loose with whomever... you can say you don't care about what massdrop did, but that's material to the argument and like saying "I don't care about facts, listen to my feelings."
If you want control, go it alone. If you want volume and sweet commissions without having to deal with the logistics, turn it over to massdrop. But don't get mad when they act as a poor partner, because they have well established they don't care about you.