There are people who should be showing in the guild roster that are not showing up. Search individually and they show up and have high ranks with in the guild but do a guild search and they aren't with in the top 25. I myself am one of these people and I have the highest rank with in the guild.
Nice website but needs the bugs worked out of it. This could become a great tool to see who is ready to raid with in your guild and where they should be in which raiding groups.