There must be duplicate copies in another location.
You can got to Tools/Display Primary Modules Folder and Tools/Display User Modules Folder to check for only one copy, but maybe the easiest way would be to search your whole drive for the file name of one of the files and see if you get two hits. If you do the others are probably there as well.
Developer, Bible Analyzer
But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness. (Rom 4:5 AV)