Hi,
I am facing the same problem after adding 3 portfolios on one page.
Last two are not working and the first one(FAQ) shows the pop up for a second and hides it, however, if I use a single portfolio, it works pretty well.
This plugin seemed really great to me when I was experimenting but when implemented it is a mess.
No doubt this error would be in pro version also.
Huge-IT, I am sorry to say this but this is reality.
This is a great plugin that exceeded my expectation.
Hope to get it fixed soon.