Would those "go north"s you've been adding be the ones at the bottom... because that's where they go.
Yes I think we need move up/down - this is logged:
http://quest.codeplex.com/workitem/1057In the meantime, you may find it easier to switch to Code View and edit the walkthrough steps there (they're at the end of the file).
You can't put expressions directly in "other names" as it's a string list, but you could use a script to dynamically add a string. For example, in your game you have a journal the player can use, and you get then player to put some text in a variable called new_text. Well, once you've done something like that, you can add new_text to the "other names" list using the script command "Add a value to a list" (Variables category). Then the list name will be something like "myobject.alt" (where myobject is the name of your object - "alt" is the attribute name for "other names") and the value to add is "new_text".