Not the same note paddings

Hi,
I was creating Notes with images and text inside, but padding around picture is not the same on all sides.
I’ve corrected some values to adapt paddings, but I can’t adapt the bottom padding perfectly.It has always a little more separation. How I can do it?

Pics:

http://oi60.tinypic.com/4uhylv.jpg

http://i62.tinypic.com/25rf5nt.jpg

https://ww.wp.xz.cn/plugins/shortcodes-ultimate/