I tried this product recently and "Last Refresh" was a big pain point. I'm sure there's technical reasons why it's hard to keep things fresh (many airlines don't even appear to update their own listings until you try and book) but it was frustrating to find what looked like good deals and then spend the effort to book only to be told it wasn't an existing offer.
We need to do a better job distinguishing the two.
May I ask, are using the live search or SkyView cached search?
If you are using the live search (SkyView toggled off), all results are in real-time as you search.
If you are using SkyView cached search (SkyView toggled on), results are saved up to 4 days, but you can search 60 days at a time from 1 airport to all of Europe's airports.