Very odd, I used the guides twice now and that has not happened, the 2 characters were Alliance and Horde, Hunter and Pally.
I am about to do another character (probably a Priest or Warlock) to get more storylines added to the guides, including Thaldraszus, storylines to do before you get to the main city. Then continue with the campaign. After the campaign to complete other storylines. This should achieve Sojourner achievements in all zones along with a few explore achievements. There should be like 3 or more extra achievements in the progression including the earning of dragonriding mounts for each zone too.
Once I am done optimizing the guides I’ll run a fourth character either a Shaman or a Mage (I am more inclined to use my Mage, I may change my mind later on lol) while keeping track of a timer so that I can report and claim how long it will take to ding 70 and complete the guides etc. Just some useful data to know 