Issue in Expense workflow

Hello

We are facing multiple issue in the expense workflow

1. Few of the expense reports are getting auto approved, however the auto action is kept as False in the expense approval rule. I have referred this (Doc ID 2023928.1) document, but I wasn't able to verify the setup part, as I couldn't find the exact setup.
2. When an expense report is reassigned, then the manager do not get the notification, and when it is timeout the user gets a notification that the expense report was rejected.
3. For few claims, the manager gets the notification, but unable to approve it. We have verified that the expense report is going to the correct manager.