User blog:Dalla8/BLOCKED BONFIRES DS2 HELP ME

I'am at the Drangleic Castle and i've just beaten the 2 knights and then i went to the next bonfire but when i lit it and used it i saw that many bonfires discovered were BLOCKED and named only by "???" and also the door after the knights to the mirror knight is BLOCKED, i can't open it in any way and the elevator do not come down. HELP ME PLEASE