New iPod touch user here. I pose this question because I haven't seen it addressed in the manuals: Today for most of the day the side volume buttons and the volume buttons on the earphones had little control over the volumes and did not sync with the volume slider. While it gave more steps in the loudness range, it did not sync with the volume slider on screen (it almost wouldn't move at all...like it was somewhat locked). Now, about 30 minutes ago, both the side controls and the headphones control the volume completely and the slider volume on the screen moves in unison with both. What would cause this to go "in and out"? Make sense? Thanks for indulging me.