I've setup multiple subscription tiers. I've configured Stripe as my payment provider. However, in some instances, when users attempt to subscribe, if they are not already signed in they are asked to login. In other instances, when users attempt to subscribe, they are shown the tiers and then asked to register for the site. They are never asked for payment information, however, and are instead marked as paid without ever having paid. Even when I just look at the page, it says I've been billed, which I haven't. Also: the plugin's CSS is not properly displaying, whether I'm using my theme or the default WordPress theme.