Desert Speedtrap on Game Gear. Or not...??

Yesterday I received my Desert Speedtrap Game Gear cartridge. I popped in it, as the title screen reads... 'Taz-Mania'?
What's up with that? I don't think anyone would try to con me for a couple of Euros, and it doesn't look like the label
has been glued on the cart or something... Weird..!!

I used to have a MIG-29 cartridge with Cool Spot on it.

Most likely they just swapped the cart casing around; I did the same with my Mega Games 6 cart with another game when the plastic got snapped on the edge. That, or it's a manufacturing mishap.