They work OK but if you click the first one, and then click an element from the second one, page scrolls to first one (showing the wrong “opened” portfolio item). Why? How to unique reference each portfolio?
The Angular theme does not support multiple ajax portfolios on the same page because the portfolio grids do not have an unique id and the ajax (js/php) function does not check which portfolio grid sends the request. You could “merge” the portfolios and select the categories of both portfolio grids for one portfolio only and then remove the second grid.
If you really need a theme which supports multiple ajax portfolio on the same page try “Enfold” which uses a new, shortcode based portfolio logic and in theory you could add an unlimited number of ajax portfolios to the same page.