k, logged on to wow cos i have a rare weekend of no wife...
apprently cos i entered a naxx 10man once im now saved (wihtout killing a single boss)
seriously this is insane...send me the SQL backend script on raid saving ID's and i'll have it fixed in minutes..
clearly u just need a clear all player id's after the boss is killed and then save all player ID's once boss is dead.
its just clearly a stupid programmer error and needs fixing...blizz..i'll even do it for free...no fee..no salary..just give me 5mins on ur script and u'll have a perfect working method of saving players into a raid.
technically, every single person from 1 server cud get saved to a single raid ID...IF this is even possible ( which it is)..its clearly a broke script..