I’m going to make some sort of guess, but I am by no means an expert. How is your charge going on the USB? Are you getting a full charge? One place you can check this is under “My Computer”. Right click on the Sansa device and look at how much the battery is getting charged. It will say a certain percentag up to 100% charged. This could depend upon your USB port and other issues with your computer as to how well your device is charging through the port.
Which settings are you referring to? On the device itself there is a Settings menu. If there is any question about the firmware that has been installed on it, there will be a number for the firmware right on the device under that menu. You can also check this as I wrote above. The firmware version is listed there too.
I’m not clear on your FM preset question. Are you trying to go from one station to the next?