One thing I think people need to be careful of is sequence.

If you set expiration off and then follow up with a set check policy on then the check policy will override the previous setting and re-enable expiration checks.

And I think BOL needs a button in it along the lines of "Article requires further clarification" or some such, it's pretty complete as far as online help is concerned, but there is the odd article that could use some work, this is one of them 🙂

-d