smart list - adding new task not tagging properly

espressodaily says:
I love how smart lists automatically tag a new tag with the tags of the smartlist. What I have noticed is that if my smartlist has NOT in the search, this doesn't work. I use a scheme borrowed from one of the blogs where each of my projects has a "." in the first char of the tag. (.rampup, .tradeshow).
For example, I have a smartlist for work, named w-misc, with the search being: "tag:work, AND NOT tagContains:."
Any help?
For example, I have a smartlist for work, named w-misc, with the search being: "tag:work, AND NOT tagContains:."
Any help?

apgordon says:
Try it without the comma and AND.
tag:work NOT tagContains:.
tag:work NOT tagContains:.

You have to make the smart list criteria unambiguous if RTM should be able to add tags, locations, due dates, priority, list or whatever to new tasks. If any part of the criteria is ambiguous RTM gives up altogether, leaving you with a task with no meta info.
How to avoid this: Don't use OR or NOT in your search.
How to avoid this: Don't use OR or NOT in your search.