It may sound harsh to point out, but 5 instead of 18 out of just 2 runs is possible with the number generator. You may have just been royally screwed by the RNG. On Friday this week, I ran 5 Sambrog runs and got no items, only relics and bounties. It's odd, but not impossible. I would wait until you get 6 - 10 runs to see if the averages really have changed.
[URL="http://www.osf.guildlaunch.com"]The Order of The Silver Flame[/URL] - A fun, mature, helpful and friendly kin. Come join us on Silverlode!