I'm trying to make puzzle piece, so I want to cut out circle from rectangle, but somehow I can't make their left sides to coincide :/ 
Does anyone had same problem? 

[![enter image description here](https://i.stack.imgur.com/amnww.png)](https://i.stack.imgur.com/amnww.png) 

As you see when I click 'Horizontal Align Left' icon, it's what I get on pic.