I've read about this across different forums but have not found a satisfying answer. Does the manufacturer (Canon in particular) reset the metadata shutter count when replacing a shutter?
I've changed the shutter on my Canon 5D Mk3 due of one of blades desync at a shutter count of ~170000 (more than the expected of 150000). Now when I'm looking with the same tool and it says 53371.
Note: I use(d) an utility which I downloaded from http://www.shutteractuations.com/
Now it seems that they offer just the online option.