I just bought a used 1DS MKII. The camera had a new shutter installed by Canon last year and the first owner then stored it. I was curious about shutter count so went to myshuttercount.com and after uploading a JPEG from the camera, was told the camera had 28,388 activations.
My question: Canon resets the count after a new shutter is installed. Would that reset effect the information that myshuttercount gathers from a JPEG?
I don't know anything about the program you used to check the count (many aren't very reliable) but Google 1D Count & see if you can find the link to that site. It seems to be reliable based on many comments I've read over the years. (Doesn't work on mark 3's & later.)