Arduino <> Lobotomized Arduino <> Serial monitor

Hello friends.

Now I'm getting correct answer if I get Rx signal directly from pin 1 of FTDI.

PC <-> USB <->Arduino w/o atmega <-> ftdi pin 1 <-> Chipped board rx pin
                                     tx pin     <-> Chipped board tx pin
                                     5v         <-> 5v
                                     gnd        <->  gnd

Why is this happening?