From the piece:
The group's official reason for barring Broadway from joining was her lack of a military ID card — something only available currently to opposite-sex military spouses. But a review of the group's previously published bylaws, provided to BuzzFeed, contains no mention of an ID requirement. And it wasn't until after Broadway published her letter that the group added any mention of an "active ID card" requirement to its website.
Broadway told BuzzFeed that the different treatment made no sense to her and said it especially stung given how long she had to keep her relationship a secret under the military's "Don't Ask, Don't Tell" policy.