Unfortunately I am building on a localhost environment as well, I wont have the site live until early February.
However I know the issue only occurs when the portfolio posts are all exclusively video oembeds posts. It is corrected if one of the items in any active category is a an image. To test this simply create an isolated dummy category and post with any oembed video service (youtube,vimeo) and exclusively display it in a page.
I will be following this post for any updates and work my best to help if i can as I need this to work!
