Plugin Priority? How does it really work?

I've been coding my plugins under the assumption that they get executed in this order:

Lowest => Low => Normal => High => Highest => Monitor

However today as I was trying to fix some permission / command issue I realized that this order is in fact not respected all the time and seem downright arbitrary.

Here are some examples of my testing on plugins listening to onPlayerCommand logging their current priority and call order:

For some reason, I can never manage to make my "logging" (WorldLog) plugin to be called last, no matter which priority I set it to. I am not sure if I'm doing anything wrong or if the registered priority is ignored or what. This is causing me some issues right now because I have plugins dependent on the order they get called.

Anyone able to provide some insight on the cause or possible solution?

 

Doesn't work properly atm. I submitted a bug report.