As long as all matches it is not a problem unless you also have the safety cams with the normal filename in the folder as well.
Although I never seens that filename for the AU cams, have no in my collection, but did not use new files in ages either.
The standard filename would be "Safety_Cam_AU_TomTom.XXX" -the XXX is the file ending substitue for the various files.
Dlete the DCT file for the cams and rename the files, use FastActivate to activate them again and check for a difference.
Or make sure you really got the original TT cam files to start with.