'-n' command option doesn't respond as intended while using it in the Terminal.

First off, great course! So in the Terminal, the output I get when I type this at the prompt: cat -n bird.txt cart.txt statue.txt is slightly different than when I type the same in the workspaces command line prompt. I get back the content numbered, but all numbers are #1, as opposed to the ascending numbers I should get.

I get:

    1    There is a bird here, looking up at the statue with interest.
    1    A stand selling hot dogs and bottles of diet cola.
    1    A statue of a hunter standing over a dead bear. Creepy.

When I should be getting:

    1    There is a bird here, looking up at the statue with interest.
    2    A stand selling hot dogs and bottles of diet cola.
    3    A statue of a hunter standing over a dead bear. Creepy.

I'm guessing this has something to do with the versioning of Python on my machine. It's default is still Python 2 but I use Anaconda to be able to use Python 3 in the Terminal. Any ideas as to what is happening? Thanks in advance!

PS. Also, when I try to use the long form command of ls --all, I get an unusual error back:

ls: illegal option -- - 
usage: ls [-ABCFGHLOPRSTUWabcdefghiklmnopqrstuwx1] [file...]

This has to be related, right?