[ChrisMillward]

I have a Genre column called Subject which allows me to create a hierarchy of my technical books, articles and theses.It also allows me the flexibility of referencing the same book under multiple subjects if it's not clear where to put it. However, I find that when I try to eliminate certain items from the display using CTRL and selecting the red minus for each category it doesn't work properly. For example, if I wish to remove 'Articles' and 'Thesis' I get:

not#subject:"=Article" or not#subject:"=Thesis" as the search.

So, with 2 Subject examples entries

Article,Microscopy.Atomic Force (Item removed)
Microscopy.Atomic Force,Thesis (Item Not removed)

It's search stops after the first item "Article" is checked.

But search expression:

not(#subject:"=Article" or#subject:"=Thesis") works fine for all