man ls is not man ls

[Charles Darwin]

12:07:05> ls -e
ls: invalid option -- e
Try `ls --help' for more information.
12:07:19> ls --help |grep "  -e"
12:07:22> which ls
/opt/local/bin/ls
12:07:24> /bin/ls -ce
Desktop		Dl		Documents	Library		Movies		Music		Pictures	Public		Sites		 
base
12:07:30> man ls
…
-e      Print the Access Control List (ACL) associated with the file,  
if present.
…
12:07:46> man -w ls
/usr/share/man/man1/ls.1.gz
12:09:52>