Without screenshots to see what’s going on, can’t confirm. I want to assume that by {1} - {2} they mean the damage is changed from its original value only, to a random value between original and double (and not half and original).
Neat, I use Crysturtle as my frontline tank for Bounty weekends, personally. Pairs well with Man-at-Arms, Droggo, and/or Tigraki Warrior.
Also, apparently shiny versions include background lore. Nice!