Ok so when i go down below the halls of pain to the halls of vaught and try to take the stairs back up it' wont let me. Same with the crystal passage to the glacial trail... Not sure what's going on never seen this glitch before also couldn't find anything on google about it

Er, the only thing I could think of would be an issue like when you try to enter Duriel's chamber, and you click but cannot enter until you re-position yourself.

I don't think there's an actual glitch preventing the entering of specific zones, however. Just restart your client.