Hi Vince,
You need to examine your Name Mapping scheme - specifically, the recognition criteria of the Aliases.firefox.pageBackupOnlineRemoteDataBackup6 and Aliases.firefox.pageBackupOnlineRemoteDataBackup4 objects. It looks like the criteria are ambiguous and therefore TestComplete recognizes the same page as different objects in different test runs. Also, if the two objects are actually supposed to refer to the same object, you should probably remove unnecessary mappings and make only a single page object be used to avoid further problems with your Name Mapping scheme.