Difficulties merging "evil twin" directories/files

I am having difficulties merging directories and files which are added at multiple streams/workspaces before being merged together (described as "evil twins" in the Jazz merge article). I tried following the article at: http://jazz.net/library/article/39#Example_6 and the help at:
Resolving Structural Conflicts.

The UI does not seem to respond as indicated in the article. When I add a file in the same location with different contents in multiple changesets (add file, suspend changeset, new changeset with add file same location, different contents, resume suspended) I do not get a content diff. Instead, the UI only shows the contents of the first changeset on the right hand side.

When I add a directory in multiple changesets and merge them together, I get very little feedback on what will happen depending on the type of merge resolution. The help is pretty vague and when I try out the different options it is difficult for me to get the rationale behind the options.

Could anyone explain to me what should happen depending on the choice I make when I try to merge added directories on the same location from multiple changesets?

Also, is there any way to see the contents and original changesets of the files/directories of the two conflicting changesets when doing this kind of merges?

Thank you in advance for any answer!