Wrong serial number in garmin express please help.

HI,

Today i bought a Nüvi 2545LM when i plug it to my PC (Windows 7) where express was installed it shows me the Nüvi 2545 but not the same serial number that is written behind the device, can someone help me to figure out what's going on (I hope I didn't get fooled)

Info: it shows update for North Amarica and an installed European 2013 map (i live in France btw) with NTU at the end.

SN on device : 2*E**25**

SN shown in express : 2*W**56**

Thank you.