Issue:  The Get Ranked Category Item step type only allows visibility of current Working Category and immediate Child Categories.  This step type is often used in conjunction with Rank Across Category (All Available) which allows visibility to all Categories.  This becomes an issue when the Rank Across Category (All Available) is used to rank a variable that is multiple categories deep in hierarchy and then the Get Ranked Category Item does not allow you to access that variable (or related variable at target category level).

Resolution:  On the Get Ranked Category Item step, temporarily change the Working Category to the category of the target variable you want to get.  Then select the target variable in the Available Variables drop-down list and add it to your step.  Then change Working Category back to original category.