It bothers me that even though I Save and Close, the message ' Do you really want to leave without saving?' pops up.

I have solutions that can fix the error and improve your overall working experience, Laura. 

The error message appears in applications or websites when you attempt to leave a page that has unsaved changes. This notification is designed to prevent data loss, so make sure to click Save and close before navigating away from the screen.

Alternatively, let's copy the link of the screen you're opening in your QuickBooks Online (QBO) and paste it to another tab. From there, check if you still receive the same error message. If the issue persists, clear the cache of your regular browser to remove accumulated data, and refresh the background processes.

I've included some resources that contain tips to get the best QuickBooks experience and solutions to resolve the performance issues in the online program:

• Why is my QuickBooks Online slow?
• System requirements for QuickBooks Online products
  
  

Furthermore, utilize the Audit Log report to give you a clearer picture of your transaction history. From there, you’ll see who added and deleted the time data.

Let me know in the comment section below if you require further assistance navigating QBO or completing a specific accounting task. We'll get back to provide the guidance you need.