The rulebook specifically states that conditions don't double up; no 2xfreaked out.
In the specific instance where the player asked about his choices, I suggested that his terrified couldn't be removed (since that was his original, explicit goal). In the fiction, it made sense, but it did cause us to scratch our heads.
In either case, thanks for quickly answering my questions, mcdaldno! This game has been fun, but also challenging!