Getting a code opens three tabs

Mostly this works great, but when I click “Reveal Code” it changes the page I’m on to the URL for the coupon website and opens a new page with the popup. Then when I click “Get Code” on the popup, it opens a new tab with the URL for the coupon website again. It seems a bit much to have three tabs open! Is this normal? I’ve tried a couple of different themes just to check, but it’s the same. Does anyone know how to stop this?