Facebook "Like" icon disappears after click

When I click the “Like” icon to test it, it subsequently disappears from the row of icons. For an example, see http://kriyananda-education.com/.

There should be a Like button between the Tweet and g+ icons. Can this be fixed?

I love the look of the Sociable buttons – much better than others and would hate to switch (especially as I’ve got it installed on about 17 client sites!).