Just now I realized that it's the 2nd name that is the proper filename while the first is my current project's name. Confusing, as my most recent release isn't listed right now. It used to look just fine, with only the file's actual name displayed. Any way I can fix that? Is it a known issue?
Curse formats the file names as "Project Title" .. "Version Title". Looking at what you posted, and at your addon page, I'd guess you entered "WhammyBar v0.48a" as the title of your project, and "WhammyBar v0.47" as the version title. Don't do that. Enter just "WhammyBar" as the project title, and "v0.47" as the version title.