Thought I would combine all of these into one issue for you.

1. Exclusions do not seem to work, even with the mcbans.* permission and being added to the online exclusion list it will still not allow me to join after being banned.
2. My callback time is set to 120000 (2 minutes) and I banned myself almost 15 minutes ago, then unbanned through the online interface. It still will not let me connect.
3. The Settings > Plugin Settings interface online seems to do nothing because when you go to 'Download Plugin' it just generates the default settings.yml file.
4. What exactly is the difference between standard MCBans permissions and the Online Staff List? Are both required for things to work because my admins can ban and kick using regular permissions and the Online Staff list seems to not do anything.

Just a few things I have noticed in my 10 months using MCBans. Currently on version 3.6

Some are not very noteworthy but others can be kinda serious.

Update on number 2. It took nearly 30 minutes for me to finally be able to connect.