Adding the number of comments to the grid in the Ideas list doesn't actually display the number of comments.

[Andi Blackwell]

When I use the Customize option to add Comments (which is supposedly the number of comments) to the Ideas grid, the number of comments doesn't actually display. Has anyone else had this problem?  

See below - the second idea actually has 5 comments, but the grid doesn't indicate that.

Any help would be appreciated.