Seems like when a Door appears in Haunted House, it appears on a portal and then bugs? I am not sure... I was in Courtyard of Crimsonwood Keep. My party members were in Haunted House. I used Door once and went in to show them where I am, then couldn't use the Door to go back (it didn't expire). Teleported back to Courtyard (Stone), tried @dispose, CC'd & re-logged. Door'ed again and they could see the Door but not use it. This is all the information I have since after that they just used Teleport Stone. I hope this information helps.