Just did the first draft, so to speak, of my sign up, and I included this very appealing and useful tag in several requests and offers:

"Science Fiction - Trapped In Fake Perfect World That Includes Marriage They Don't Believe They Can Ever Really Have"

Alas, that comes up as being an unavailable tag I'm not allowed to use, even though it turns up in the drop down menu and is definitely part of this tag set. *pout* Why is this?