I'm not sure yet how to quote from an earlier response as well as the last response
Next to the Quote button, there's a Multi-Quote button. If you click on the posts you wish to quote from they turn orange, then hit the Post Reply button, it will open all the posts in the editor. If the quotes are long, it can look a bit messy, but you can increase the size of the edit box by dragging the bottom right corner, which I find helps. It doesn't work with Quick Reply.
PS The code you had should be like this [QUOTE="Tdol, post: 608887, member: 5"]...[/QUOTE]- no spaces, and the number after the semi-colon refers to the post number- if you remove it and the semi-colon, you'll get the quote box without the little blue button linking back.