My tab is telling me i have 72 unread but no in my inbox

Yes, this type of problem happed to me too. Actually, this is not a problem. What happens, sometime junk mails comes that has delivery date in the distant past. So, these mails are not shown your current page. If you go to older emails you will find them.

So what you can do is:
1. Click on the "Next" link at the bottom of the page.
2. Keep clicking the link until you get those unread mail.
3. You can also click on "Unread" link at the top of the Inbox page.

This will show you the unread mails.