It does take over a month for all the newsletters to go out, but I know that some spam guards do block them before they get to your inbox. With Yahoo, they don't always even get as far as the spam box.
When you logon to your FaithWriters' account, there is a pop-up window that comes down to make sure your newsletter details are correct. Have your filled that in again?
I pretty much gave up on email newsletters about four years ago. The amount of bounces was showing that it was rapidly becoming a very ineffective way of communicating with large groups. (Thanks spammers!)
Today, RSS feeds tend to be far more effective. The responsibility to subscribe rests completely with the subscriber. No one can be signed up to anything; it's all up to them.
Things like Twitter and Facebook have that similar sort of thing where people can get instant communication via that.
Anyway, try re-entering your email address and see if it gets any better.