I just turned my AX8 off, then turned it back on an hour later, and suddenly all of the presets sound different. One of the bassiest tones I've ever made now sounds really trebly and a more balanced tone now sounds super bassy. Any idea what could have happened and how to fix it? I've tried turning it back off, unplugging it, turning it back on, and so on, but all of my presets have changed and I have no idea why. The EQ on the front is the same as before. I briefly looked at the global settings and everything seems normal (and it's not like I went into them before I turned the thing off either).