I have a smartlist that is supposed to pick up any tags that aren't tagged according to my system. It's a fairly complex query, but the odd thing is that it works sometimes and not others. Specifically, it has worked for most of the tasks that I currently have, but for some tasks it doesn't work. I can't exactly figure out the issue, but perhaps it's a bug? Here's the search term:

Searched for: (not(list:inbox) and not(tag:project) and not(tag:tickler) and not(tag:calendar) and not(tag:wait) and not(tag:project) and not(tag:nextaction) and not(tag:someday)) or (not(list:inbox) and not(tag:project) and not(tag:someday) and not(tag:wait) and not(timeEstimate:"> 0")) or (not(list:inbox) and not(tag:project) and not(tag:someday) and not(tag:wait) and not(tagContains:"@@")) or ((tag:tickler or tag:calendar) and due:never) or (not(tag:tickler or tag:calendar) and no(due:never)) or (tag:nextaction and not(tag:@call or tag:@web or tag:@errand or tag:@home or tag:@work))

When I tag something with wait but don't tag it with anything else (aside from an @context), it shouldn't show up in this list. However it does. When I remove all but the wait tag, it still is in this list, however, when I remove the task and re-add it just with the wait tag, it doesn't show up anymore! I have other tasks that have exactly the same tags (and all other fields besides the task name) and they do not show up in this smartlist. Any ideas?