Added extra slider and changed login page

As soon as I updated to 3.8, a fourth slider appeared on our homepage slider (Sterling Theme by Themeforest). It repeats one of our existing but without the embedded Vimeo video. This rogue slider does not appear in the admin slider area so I can’t delete it. I’ve contact host and they say they can’t help. I have to go to support forum. Here I am! Also, after the same update, the logo filed on the login page was suddenly less than half the size it was, so we are seeing about one letter of our 4 letter logo. How to I put it back to the previous size?