This is a great thread.

Now, I have a Myth. The Secret Level events don't always work. I was playing fearofdark's "War of the Rabbits" pack about 2 weeks ago. I went to the secret level event to go to the 2 Industrius levels.
After completing them though, I was not warped back to where I found the Secret.
Instead, it went to the Turtemple intro. After trying to go to the next level I was sent back to where the secret was.
Why did this happen? Is it just buggy?