"Because these ballots were returned in envelopes similar to absentee ballot requests, elections officials opened them," The Washington Post reports. "If the ballots weren't then enclosed in another envelope which shielded the actual vote being cast, they may have been considered 'naked ballots,' a term used to describe mail ballots returned without the voter's intent being protected.

The Trump campaign and the Pennsylvania GOP in a lawsuit argued that "naked ballots" should not be counted. They won that lawsuit. These nine ballots appear to be "naked ballots," and that appears to be the reason they were thrown out.