Reply To: Nivo Slider Transition

With the small image in the corner issue, see:

http://support.dev7studios.com/articles/nivo-slider-jquery-plugin/fix-small-image-in-top-left-hand-corner

So just add:

.nivoSlider img {
    max-width: none;
}

https://startupwp.com/topic/customizing-your-theme/

As far as the transition, it could be related to the same problem, but might be a conflict with other jQuery scripts being loaded onto your site.

Try deactivating all plugins except Nivo and see if that makes a difference. Be sure to clear all caches too.