We made a post in the suggestion forum, and many people have talked to GMs in game regarding the issue with how the despawn timer is supposed to be 3 hours instead of 7, and 30 mins instead of 3 hours between demons. Syrah responded, as many of the gms did as well, by stating we have to use the bugtracker for this issue to get recognition.
The URL for the bugtracker is:
http://report.nostalrius.org/plugins/tracker/?aid=1799If you make an account on the site, you can update the bugtracker towards the bottom. If as many people who read this could post on the bugtracker, we might have a chance to get this fixed by the developers ASAP!