Hello,
1. A page that uses Template > Portfolio should be only one on site. To display portfolio project on different pages you can use Post Grid or Post Masonry Grid http://prntscr.com/fkel1n http://prntscr.com/fkelec + http://prntscr.com/ifkypp > http://prntscr.com/ifkyv3, select design http://prntscr.com/fkemf8 or create it by yourself http://prntscr.com/fkemjh https://vc.wpbakery.com/video-academy/grid-builder.
2. The plugin, that you use to create such forms, doesn’t come bundled with our theme. Please note that we don’t provide support for 3-rd party plugins as it’s out of our support scope.
Regards