trouble with pdf object

Hello,

I found this kind of trouble  :

When I place a pdf file   as an object in the drawing and try to draw something ,  after using zoom  pdf file don't go back in previous place, it is scaled. Can  anything be help it?

When I try to print using a   style monochrome.ctb everything goes ok except for fills, which are still  in color, is there any switch that is responsible for changing fills to monochrome?