Same domain is bad enough. I've done searches where the first three results are all the same page-- by amazing coincidence, Amazon. Just different versions of the same book.
There's a thread somewhere hereabouts concerning the equally unpredictable - sign. Even if it works as intended, it may not, uh, work as intended. Search for "widgets -foobar" and you've excluded all the pages that helpfully say "widgets often come up in the popular phrase 'foobar widgets'. But I'm here to talk about widgets in their own right".
My record is also 14, but I also had only 5 domains fill up up 7 pages of results, its just getting ridiculous. Every sane google searcher wants as many different options as possible, not one domain fill up 50% of the first 10 pages.
All of this kinda suggests that they need to put some more work into "sitelinks". If you're getting 85 different results from the same site, isn't that exactly when you should consolidate them all into one package with a wad of sitelinks to cover all options? Result: a big fat #1 result that fills half the screen ... but it will be followed by nine entirely different results.