My support ticket was summarily deleted without any comment, acknowledgment, or explanation. I now have 17 reviews and a high rating and am still being penalized without explanation.
Another ticket has been filed.
EDIT: My mission finally became eligible after just short of 30 plays. This definitely demonstrates how severely an author test impacts the mission's run-through time, that it took that many plays to get a 60-minute mission to become rewards-eligible.