It takes at least a minute after start up before I can change pre-set stations. I know it doesn't seem like a long time, but when you're driving and can't change the station, it really is. Sometimes the music will change, but the screen won't. It will play a new station but the screen shows the original station. Plus, the colorful Siruis XM icons on the pre-sets don't show up until you press them, no matter how long the Explorer has been running. I just see a generic channel number in white, like "71". But after you select it, it will read "Holiday Favorites" in color. Is any of this normal?