Hey Chao,
I can open the projects that are appended by the infinite scroll on my machine. Which browser (and version) are you using?
Regarding your second question – as I said the infinite scroll has certain limitations when applied to themes, including the fact that it uses the second and all other pages from the paginated version to append new items, which means that whatever element appears on all pages, it will be rendered with every scroll (including sticky posts and portfolio tag headers). I will look at a possible way to circumvent this (adding a separate template file for paginated pages), but it may take some time.
Sincerely,
Andrew / Satori Studio