Cassy and Motor VIN

Just a quick question I got my bike, it was an abandon vehicle so I don't know the history, so my question is the VIN on the chassy and what apears to be the VIN on the motor are different does this mean that there was a motor swap, or where they maid this way. What I believe is the motor VIN is on the left side above the driver foot peg.

i hear that it is very rare that they ever match

I second hydrolazer...the flip side being, if you had a another motor that was close to the original engine VIN, a swap would be undetectable...which is why most titles are concerned with only the frame VIN.