Discussion topic for “Sort by Vote” and “Sort by Comments” displays only the discussion with most vote and comment respectively.

Discussion topic for “Sort by Date” option displays the discussion in date order but “Sort by Vote” and “Sort by Comments” displays only the discussion with most vote and comment respectively. It must also be sorted if there are votes and comments for other topics.

Steps:
Create 2 or more discussions
Provide Votes and Comments more for 1st discussion than the 2nd discussion.
Now Sort by Vote and Sort by Comment.