Strange Twitter button activity

Hi,
Love the theme! Great job.

One small niggle I was hoping you could help with please.
When I add code for a Twitter follow button (taken from the Twitter site), it renders when I’m on the home page, but for some reason doesn’t render in the same place when I’m on individual blog posts.

Compare these two pages to see what I mean (under the headline of the first post and also in the right-hand sidebar):

http://subcontinental.net/

http://subcontinental.net/2015/01/03/what-i-learned-about-tackling-corruption-and-trauma-in-ukraine/

Anything I can do?
Many thanks,
Eric