Why can you not delete them? It has to be done otherwise WordPress will not load them properly at all.
When WordPress performs a download of a plugin or theme, it downloads, copies and them removes the original download. Sometimes it fails to perform that removal of the original. Then when you download a second copy your computer OS will add a ‘-1’ top the end etc. There MUST be only a single copy in the SP plugins folder and it does need to have the correct name – like all plugins. So – why are you unable to delete one of them and rename the other? You would need to use your FTP account or – the file manager that will be bundles with your website control panel.
May I ask if you are the ‘Sara’ that has sent us some email questions – including a second email regarding template tags? If so we have replied to each and every one – including earlier this morning – and they all get bounced back stating that the email address you have used can not be found. We keep getting emails from the server attempting to deliver them to you but they all fail.