When setting up an import from Salesforce, you must pick an External Segment as the source of the data. An External Segment is essentially a pointer to a Report in Salesforce.com or a pointer to an (S)FTP.
Select Create New External Segment and choose Salesforce.com Report as your source. ROI will show you a list of all the reports in Salesforce.com. If there are two reports with the same name, you will see both listed. ROI knows they are different because behind the scenes the ID of the Report is stored in ROI, and of course the IDs are unique.
We recommend you always use unique naming conventions in ROI and in Salesforce. If you are having trouble figuring out which Report is which, move one of the Reports to a different folder in Salesforce.com.
Contact Support@rightoninteractive.com if you have additional questions.