Your camera is almost certainly recording both files correctly: a JPEG and a Canon RAW file (.CR2). Two files with exactly the same full filename cannot exist in one folder, so what you’re seeing is likely a Windows/Explorer display issue or file-association problem hiding the real RAW extension and making the RAW appear like another JPEG.

A few things to check:

• Show file extensions in your file browser so you can confirm whether one file is actually .CR2.
• Use a command-line directory listing or another file manager to verify the real filenames.
• If you installed software/codecs that try to interpret RAW files, they may be confusing Explorer’s display.
• Try transferring with Canon EOS Utility instead of dragging files directly from the camera in Explorer; one user reported that this made the RAW+JPEG pair appear correctly.

In short, the camera is likely fine. The problem is with how the computer is displaying or importing the files, not with RAW+JPEG capture itself.