Tags are cool.
If you want your tags to work like this, you can't have spaces in the tag. I use a period between words, some use an underscore, others a dash – but a space won't work. It'll look like it worked, but if you go to the tag link, it'll say the tag does not exist. For some reason, LJ puts a + between the words, instead of a space (or a %20 even) – which means, it won't show up right.