Steps to replicate the issue (include links if applicable):
What happens?:
The selected entry on the license picker is "Other Alternatives:". The "None selected" message is also marked as selected in the HTML, but because the last section header comes later, it is used by the browser.
What should have happened instead?:
The "None selected" message should be the only selected entry.
Software version (skip for WMF-hosted wikis like Wikipedia):
Other information (browser name/version, screenshots, etc.):
Not a Commons-specific problem, also happens on https://en.wikipedia.org/wiki/Special:Upload