I logged in upon reset and had six notifications for my daily x3 moonstones. I received 18 moonstones and that is definitely not what is supposed to happen with the monthly membership.
Hey there, this may be an error with the premium subscription, thank you for bringing it to our attention! Did you happen to catch what your moonstone count was before and after you claimed the Moonstones? Is it showing 18 Moonstones right now?