widgets 'gone weird'

Hi Everyone

I updated this theme recently but some odd has happened to 2 of the sidebar widgets, categories & archives both words appear twice.

I am using the basic wordpress widgets but this only happened after the update.

So they say categories one line & then again underneath…I am using the drop down box (as I was before but this did not happen then).

I have tried other widgets but this seem to cause major errors & are not compatible with this theme.

does anyone a) know how to fix this? b) any other widgets that work well instead?

Many thanks

Laura