I sent a ticket in on a raid that said it had 10 people in the 5K+ spot and 3 in the 1999- 4999 spot, yet there were only actually 8 people on the damage/healing/actions section and showing the same in the feed. It now shows 10 in each position yet only 14 actually there. Where are the others hiding???? I have not yet received an answer on the ticket but Kano should do something so the participants aren't punished for the bug if/when the raid fails because there aren't enough people to do a reasonable amount of damage. This is the only one I noticed like this but if I were a betting man I would say there are others, and if you find one Unicorn you should probably be watching for others.
This has happened a few times, Support has a procedure in place for sorting things out and getting everyone in their proper tiers. Normal Support response time is 24 - 48 hours, so they should get back to you soon!