Hello and welcome Pinhel. What are your problems with the stencils? We might be able to help in finding a solution. e.g. you can move the stencils with the arrow keys on your keyboard and holding down the Shift and arrow keys will move the stencil by larger increments.

Duplicating stencils merely entails selecting the same stencil again or as many times as desired. To resize you can enter the width, height and rotation percentages in the Transform window which appears when you click on the stencils or choose Transform from the ribbon at the top of the canvas.