Distorted shape after using pathfinder (illustrator cc)


I have this shape (no strokes): enter image description here

when I use the pathfinder unite tool the image is distorted to the following:

enter image description here

I have unchecked align to pixel grid, scale rectangle corners and scale stroke from the transformer control panel.

I've looked online for an explanation but can't seem to find one. Anyone has an idea for this?

2/13/2015 1:25:00 PM

I figured it out eventually. The problem was when I created the document I assigned it to a web profile; therefore, the pixels are align to a grid even if I had removed the align to pixel grid function. I created a new document, but this time with a print profile and the problem was solved. I wasn't aware of this feature until now. Thanks the help!

2/14/2015 3:00:00 PM