by DThor » Sat Jan 12, 2013 10:59 am
Keep in mind that 1500 days of headers in one group might be a few hundred, in others many, *many* millions(i.e. I'm doubting you downloaded all headers for some of these without taking many days). Also, some groups have more activity than others. Some go dark for weeks or even months, so it's difficult to tell what you're seeing.
Most likely, though, the issue is you've downloaded a lot of headers, but Newsbin is still injecting them into the database. You can check this progress by looking at the bottom of the program, the Cache entry. If you see a number in brackets e.g. "60/100(500)" then Newsbin is still working on them. When the number in brackets goes away, it's caught up.
If you downloaded all headers from a monster group like boneless, you'd be waiting a very very long time for that to process. Just getting them in the first place would take some time.
DT