[wglb]

Not sure what you mean by "multi-layer sequence", as it is a simple link at the bottom of the page "send feedback".

Even though the cause of the problem was not in Google's hands, given that they got the data from outside sources, nonetheless I would presume that they have the ability to correct errors.

[gumby]

I was going by what it says in the article: "while Google says it invites user feedback on its maps, it doesn’t always act on those suggestions. And even that process, which involves clicking through three levels of menus, precludes users with limited computer skills."