Serial port login

If I attach a noteboof to /dev/ser2 and login using
Hyperterminal, I get odd behaviour. I can login (after
several tries). Once logged in, each letter I type must
be typed twice.

I have entires in my /etc/config/ttys as:

ser1 “/bin/login” qansi-m on
ser2 “/bin/login” qansi-m on

Can anyone explain and or tell me how to stop it doing

Whoops, pressed the wrong button.
I fixed this I think. I believe that two or more logins
were reading the same serial port. All OK now.