Three common reasons why items do not circulate as expected:

1. Policy has changed and the circulation policy in Evergreen needs to be updated to match your actual library policy.
2. The expected policy does not currently exist in Evergreen.
3. The item attributes for the item are incorrect. Most commonly the circulation modifier is incorrect.

Information on how to check your item attributes can be found here.

Information on requesting changes to your circulation policies can be found here.