Loading comments sometimes fetches comments from the wrong post

[maltzj]

I'm impatient, so sometimes I'll start loading one set of comments and then go back and start loading another set. However, this sometimes results in the comments from the initial post being shown.

I think this issue occurs because we just blindly call showComments() if the task was successful. There needs to be an additional check to make sure we're showing the right ckmments.