Although you are updating the November web-only ads, you are not dating the updates. It's better when they are dated, APA. The dates help me know whether there's been an update without memorizing what the last ad was. It also helps me make year-to-year comparisons--how many ads were there at this time in 2009 or 2008, as compared to now? It's hard to tell if the updates are undated. And if you're not going to date the updates, you could at least change the date in the the "last updated on" announcement that appears in the upper-left corner of the page in big red letters. That would help a little.
Yours most sincerely,