Lore Untangler achievement question

https://wiki.guildwars2.com/wiki/Rata_Novus_Instructor

8. From First Level, take the mushroom to the south. Glide west out of the waterfall area. As you pass through the arch turn left and land on the rocks. Walk to the southernmost point on that ledge, then go to the character select screen and return. You will appear at the level above near the Instructor.

These instructions appear to no longer work. Either that or it is not detailed enough. Either way what it the right way to get to that instructor? Or the exact right spot to be, since it sounds like to me this was written to take advantage of a game glitch. Thanks.

It's weird indeed that on the official wiki there's the "cheaty way".Unfortunately, also AyinMaiden used this method:

Not quite sure which instructor that is, but the achievement itself does not require you to talk to all 20 instructors. You just have to answer 20 questions correctly, whether you answer one per instructor or answer the same instructor's question 20 times (with the appropriate waiting time inbetween) or any mix you feel good with is up to you.

@Rasimir.6239 said:Not quite sure which instructor that is, but the achievement itself does not require you to talk to all 20 instructors. You just have to answer 20 questions correctly, whether you answer one per instructor or answer the same instructor's question 20 times (with the appropriate waiting time inbetween) or any mix you feel good with is up to you.

I discovered that after I came back again to finish them. So it worked out, I originally thought you had to go to all of them like similar content where you had to get X out of Y to complete it.