email notification sending every hour!

Same here. Not every hour but more frequently than we would like. (many times per day.)

Expiration frequency (in minutes): = 5000
Notify before expiration: = 14
Plugin version: 0.9.8

A look at the cron information shows:
Once Hourly: content_scheduler_notify, every 60 mins
CS User Configured: content_scheduler, every 3 days

Same here. For example, mails was sent at:
10:36am
11:46am
1:24pm
2:09pm
2:40pm

and so on…

In the meantime, until the plugin gets updated, you can tweak the notifications to get generated daily instead of hourly by changing the 4 hourly references in content-scheduler.php

from this:
wp_schedule_event( time(), ‘hourly’, ‘content_scheduler_notify_’.$current_blog_id );
AND
wp_schedule_event( time(), ‘hourly’, ‘content_scheduler_notify’ );

to this:
wp_schedule_event( time(), ‘daily’, ‘content_scheduler_notify_’.$current_blog_id );
AND
wp_schedule_event( time(), ‘daily’, ‘content_scheduler_notify’ );

After making the code change, go to the plugin options page and re-save your options.
This worked for me.
J

Gang, I’ve pushed a version 1 update. Regarding notifications, the update only notifies you upon expiration.
The problem we were seeing resulted from trying to notify you ahead of time, e.g., “Hey, this content is going to expire soon.”
I can add that functionality back later (better…) but wanted to get a fix in and out to everyone.