MLA Works Cited Pages

In MLA Works Cited pages when documenting websites and parts of websites with an author or editor you are supposed to put the publisher after the title of the website, and the title of the website should be italicized. On work from a website which is defined as short works such as articles or individual web pages the title of the short work is placed in quotation marks and the title of the website is italicized. I am confused on what is the difference between the two? While researching my blog I discovered that the difference between the two is that if you are using an entire website then it would be the first example. The website title would be italicized and then you would list the publisher. If you are using work from a website you would use the second example. The title of the short work would include quotation marks around it, and the title of the website would be italicized. The other question that I had was when the author’s name is the same for two different resources in the same paper should you use three dashes in the place for the author’s name on the second resource cite? Also, do you then alphabetize by the title?