Your device may be broken or something, because the functionality of the multi-tasking bar is pretty well defined. Double click the home button, the bar appear

Your device may be broken or something, because the functionality of the multi-tasking bar is pretty well defined. Double click the home button, the bar appears with a list of your most recently used apps, sorted in that order. the only way you would get ipod controls is if you swipe to the left on that bar, which reveals the media controls (works with apps besides ipod, like pandora etc).