See repeated /usr/bin in my path

[J M]

Hi,

I see repeated /usr/bin in my path.
I don't known if is something of my PC or not.

To check I do:
which -a ls
Show:
/usr/bin/ls
/usr/bin/ls

My path is:
/usr/local/bin
/usr/bin
...
/usr/bin
...

Seeing other files, I reach to /etc/profile and use one variable
ORIGINAL_PATH that contains one /usr/bin.

But I can no longer see where that variable is set or if it is not from
Cygwin.

Regards