slider appearing twice or not at all?

i recently accidentally managed to delete a widget slider from my main page
i have tried using the widget to re-insert it but it never appears
so i tried adding it [layerslider id=”1″]
into the main text editor bit of the page
this works, but appears twice, well sort of one is blank but takes up page space still
(i know this is the same thing as no space if deleted, and i tried adding text which appears twice)
any help appreciated thanks