Based on the first two weeks, there weren’t many runners that uploaded duplicates. And if they did, it was like 1-2 at most. It is safe to assume that the remaining 4 weeks are the same.
Can remien just count the number of pics and just grant the individual and guild prices and vanities by assuming that every entry is good to go? And whoever entered in weeks 1-2 and has a missing boss or secret phase will still get the vanity if they ran the other 4 weeks as well.