I don't know how to search for this and hopefully this has been answered and someone can point me in the right direction. When using any USB loader (USB Loader GX or WiiFlow) I can play a single game and if I go back to the system menu when I'm done and go to play a new game, it will not load. It will load the same game that I just played but will NEVER load a new game. Just gives me a black screen. I've updated all the files, used files from a wii that doesn't do this, etc. and nothing is fixing it. It's a real PITA to have to shut down, reboot, and select a different game. Any help would be appreciated.
Yes that sounds weird. What guide did you mod the Wii from and can you post a system check so we can see what your setup is.
If your Wii was modded a long time a go I'd recommend using ModMii to fix it, see link in my signature. You can take that system check and have ModMii just update the needed items and you should be good to go.
And I almost forgot. You're using a real external hard drive with a power cord or an external drive with a Y-Cable correct? If you're using a Flash Drive / USB Pen / Whatever you want to call it STOP!! Other then not having everything up to date on your Wii It's most likely the cause of your issues.