AH i can help!
when you save, turn off and re-start the homebrew, a box appears and has a list of saves. you need to overwrite one of these, than when you boot up the game, click on the save you overwrote. don't worry about overriding a save for another game, there are different saves for different games so your saves for other games wont appear on another game.
EG:
Loads up wario ware inc. first time
saves, turns off, boots up homebrew again.
box appears.
A) press A
B) press B
A) your game will be saved and next time you start up the game, seect the option you overwrote.
B) your save is lost and you'll have to start over.
Hopefully that helped you!
~8BitWalugi