Hi. I may flesh it out, but I've also opened up the software. If you have extension ideas, please feel free to fork / contribute. You can flip me an e-mail (my first name @ my HN username . com) if you want to go further, or flip a note on Twitter.
An issue has a one to many relationship with tickets. I built it, as I found I'd get many tickets about the same thing from different users. I wanted to be able to focus on solving the macro issue and not manage many issues. Terry Smith is one of the thinkers behind it.
Perhaps I mis-spoke above. An issue can be associated with multiple tickets, just as a ticket can be associated with multiple issues. The latter is not beefed as much in the code, as I found the use case to be less once live.
For my use case it's fine. If the software was going to be commercial, this module would be the first to need beefing. I've toyed with re-running delayed jobs, but this setup has worked for me (Micro EC2 instance).