It's been a frustrating set of compromises, believe me. I've had people that wanted me to use the website name as the work field, and others that thought it the website was a publisher. I still believe that the organization that issues the chart in the first place should be treated as the author, and I finally removed that field from the citation because there was a very loud campaign from people that just couldn't understand that corporations can legally be treated as people. Use of italics was another set of arguments, and there was a large segment of people that believed that the chart names themselves were things that we could rewrite to suit our tastes.
The "work" field is the place where I feel the most comfortable making compromises, as it is inherently a desriptive field. I could compromise by changing the work field to read something like "Chartverfolgung Simpson,Jessica: Irresistible (album version) at musicline.de", and then treating the piece as untitled, because they really aren't providing a title for the chart pages. How would that feel to you?—