Who/what is the other logo? What logo/icon do you expect?
What is or what was the former G:?
My suspicion would be that you have two drives both trying to be "G:".
Doublecheck your drive letter assignments. Look at the properies of the "G:" drive. That may help you verify what device is really being recognized.
Likewise make sure that you have not set up some icon change with respect to the flash drive in question.