Thanks for the response.
My issue is that despite there being multiple tags created, only a single tag is shown on the sidebar, as attached.
It's possible that in sidebar.tpl, $tagcloud is a single value, not an array. I'm not that familiar with php, but I stuck $tagcloud in a foreach loop and it still only spit out the 'frontoffice' tag, not the rest of the tags.
I'm really looking for developer documentation on the tag cloud function, but I can't find it there or in the forums or through Google / Bing / Yahoo / Yandex searches.
Because of the name, I expect it to display a cloud of words, not just a single word, and I am not seeing that behavior.