Subscriptions Are Sending Immediately, Even though I want a Digest Sent on a Schedule

Hi guys!

The subscribe by email plugin is fantastic for generating simple and awesome emails automatically so that I don't have to send things out manually. However, the plugin isn't listening to what I'm telling it to do.

I'd like it to send on a schedule, with a maximum of one email per day. Instead of doing as the settings are set to, the plugin is sending immediately every time I post, and it will even send an email on the second and third post of that day. Not only that, but when it does it, the previous articles are also included within that email.

How do I fix this? I've enabled access for you at my blog if you want to take a look. Thanks!

- Charlie