Stream item - sorting problem

Hi team,

I found there are some problem with the sorting behavior, while setting the Stream> Pagination > Item Sorting = Last modified date, it sorts item in ascending order (means the older item on the top of the list) ; changing it back to "creating date" will fix the problem but I actually want the sorting with modification date with descending order.

Items with this problem are EasyBlog items in EasySocial.

p.s. or please point me for where to adjust +/- order for sorting?

Thanks.