Yes, you're correct; Amanda is eligible.

I feel that this tally represents a sad observation about HL fandom's overall relationship with its women characters.

The gap after Amanda is extreme. For myself, I feel that Amanda, as the most frequently written woman character in HLdom, and perhaps also Cassandra, with actually an impressive ratio of on-screen appearances to stories, doesn't need this ficathon in quite the profound way that many of the others do.