Alignright image with caption not working

Try adding:

.alignright {float:right}

to your theme’s stylesheet.

I can’t see that CSS in your stylesheet.

Now try changing:

.alignright {float:right}
}

to:

.alignright {float:right}

Move it to above:

/* =Print Style

-------------------------------------------------------------- */

the section of ‘print styles’ is not closed in your style.css;
therefore all added styles would only be executed if you print your page.

possibly close the section with an extra curly bracket } before these lines:

a:active a:focus{
  outline-style: none;
  border: none;
}