you sholdn't have to format for the sav.

that may be an issue.

but, just to be sure (i'm sure they'd ask you to try this), just format the whole thing and try starting from scratch. 

if that doesn't work, then there is an issue for sure.  a full formatting like that shouldn't be how you have to change a sav (although, still, the sav is in the RAM, formatting wipes the ROM, so i'm still lost as to what the issue would be).

try formatting, doesn't work, contact them.  but, your sav file should change. 

did the cartridge come pre-flashed i'm guessing then?  i would assume they flash it via the USB, however, they can also be flashed via the edge connector.  depends on what they used, although i'd assume they check stuff before mailing it, and flashing via edge connector is a little antiquated...

but, format before flashing.  then with the blank cart, go on and flash whatever to it. 

if it doesn't work past that, get in touch with them, as your cart is malfunctioning. 

basically, the only two ways to flash them are via USB, and the edge connector.  if you paid for a USB cart, and the USB port is faulty, then thats an issue.

as long as you format FIRST, then flash.