Hmm, the dates all say October 1 to me, and I'm October 16. I guess they are not GMT?
In overview ,contents more than seven days are shown in week time frame.
For example Action drop down to post questions is showing as a week ago .It was posted on Oct 2nd .14 days ago from today .It is between a week and 2 week so it is showing as a week ago .
But that should be two weeks ago. Or maybe previous week (which is slightly different and need to consider the start of the week).
A week ago means up to 7 days until now. "Ago" typically is followed by a cause/action. But not here. Therefore I would read it as timeframe.
Unless there is some reference which makes it a point in time. As in "more than a week ago" (~before last week) and "no more than a week ago" (~last week).
But I'm not a native speaker. So opinions about it might differ.
Well, "A week ago" would usually mean anything from 7-13 days ago. When it's 14 days ago it becomes 2 weeks ago.
Anything from now backwards would just be 1 day ago (yesterday), 2 days ago, 3 days ago etc. until you get to 7 and then that's the "Week ago"