Also there are two such places where you can place the code. If you place in lower one then it will appear only if ads appear in your blog.
The above has not worked for me and I am not sure about you, do you Meme?.
I searched for a place near the spans at end of post and put it above the below line
"<p class='post-footer-line post-footer-line-2'>
And it seems to work. You can meme below and retweet and check for yourself. Have you been struggling with button placement in blogger?