The numbers refers to the post-word-letter on the page (viewtopic.php?p=1285). And with the translation you will get the next problem:
"Sum the first revo released the year a girl leaves and a guy arrives."
You now have the last problem and hint in front of you:
"You have now reached the end, time to solve the last key problem in the T e a l P u z z l e H u n t."
This will tell you that the key is "TEAL".
The solution:
Spoiler:
With the knowledge that the key is "TEAL" and your collected numbers are "3 7 22 2 19 1 11 20 2" you should use an normal "A1Z26-cipher":