“Last Activity” in the forum doesn’t really represent last activity

The main page on the forum has a table/list of posted topics. One of the columns on this table is headed “Last Activity”.

What I expect this column to indicate is the time since the last reply in the topic. However, what it really seems to show is how long it has been since the post/topic was created.

I think you should show how long it has been since the last reply. This would enable active discussions to stay near the top. But if you keep things as they are, it would seem appropriate to rename the column to “Topic Created”.