I've had Roku a little over a year now. I have several different subscriptions in which I use different credit cards. I recently subscribed to Discovery App+ and used a different credit card, but now another subscription that I have coming off another card is now coming off of this one that I used only for Discovery App+? Can someone please explain why this is happening and are all the other subscriptions going to do the same? Why did my payment methods change? I did not authorize it? Does Roku only store one credit card for all its' subscriptions?