Two galleries pop up at once

@phlaf – It would appear you have two different Lightbox effects being triggered. I would suggest the easiest method to correct this is to turn one of them off.

If you choose to turn off the NextGEN Gallery Lightbox Effect go under Gallery > Other Options > Lightbox Effects and set the drop-down to none. Then click save and you should only see one Lightbox triggered afterward (although you may need to clear your browser caches first).

Thanks!

– Cais.