[whpalmer4]

The other item may not be in your Inbox. However, there are a number of ways you can spot the other item, in no particular order:

Click and hold on the dock icon, which will get you a popup menu listing among other things your contexts and a count of how many actions in each are overdue or due soon, and selecting one will get you a new OF window showing the items in that context

If you turn on Show Due Soon and Overdue actions in the Menu Bar (see the Data section of the OmniFocus preferences) you'll get a menu that will provide the same information, and selecting one will get you a new OF window showing the items in that context

If you turn on Show Due Soon and Overdue actions in the sidebar (again, see the Data section of the preferences) you'll get little numbers next to the projects or contexts showing overdue and due soon action counts and of course clicking will show you the project(s) or context(s) selected

You could use the Due perspective under the Perspectives menu or in the toolbar