you can remove artwork in the Artwork tab of the tag editor
and to drag a track to an album, there is the Quick Finder on the left panel - just choose the filter to be Album and then drag the bad track(s) to the approriate album name in the quick finder and the album name will get reset - bit of a hidden feature i will admit. However that wont set the album picture - only the name. Does WMP set both the album name and picture when you drag to an album?