Teresa,
Thank you for your business and sorry for the trouble there. We’ve used that particular lightbox on several themes now and have just recently noticed the problem you’re encountering with United. This theme handles spacing just a bit differently and that’s what’s causing the border to be misaligned.
There are two ways to fix it. I just released an update to the theme that should take care of it. To update it, go to the Dashboard section in your WordPress control panel (the home icon) and select the Updates item there. You should see the theme update there.
The second option is to go to the Theme Options page and select the Styling tab. Scroll down to the Custom CSS box and paste this:
.jquery-lightbox { /* Fix borders in lightbox evolution pop-up */
box-sizing: content-box;
}
and update your settings.
That should take care of it for you.
If you run into any questions or trouble, let me know.
Thanks again and have a great week,
Bill