The problem probably is that the area where your follow and like goes is smaller than the combined lenght of the two elements.(Like and follow button)
So lets say the max-width of the area for #widget is 550px.
And then your Like image is 300px.
And you twitter image is 500px.
You would have a combined length of 800px.
I've tried to explain it in maths since I think its easier to understand basically 800 won't fit into 550 so the browser then puts what can't be fit onto the line below so both elements fit within the width restrictions.
I'm not to sure on what your css is but its looks like the class of the widget area might be called fb-like.
Search for this in the CSS file.
The above may work depends on the size of the images remember try to use the best size possible you don't want a massive gap.