Few things can be happening here:
1. rss feed provider serves items with same name and and different url
2. rss feed provider serves last xx items and there are no more then xx new items over the period od 7 days(default recycle item time in altbinz) - after 7 days item is deleted ni altbinz and on new update it's still in those xx items
Solution for 1 is to play with those AD, DD, IDP buttons (check hint for explanation)
Solution for 2 is to raise recycle item time in altbinz for that feed. There is no simple solution for that, so try this one: Close altbinz, open up rssdb.abz (if needed rename it to rssdb.abz.db3) file in misc folder with some sqlite3 db editor. I recomend SQLiteSpy.
Once you open db, dbclick on table main and then change value recycle_items_days for feeds to value which you want. Save db, close SqLiteSpy, rename file back to rss.db, open altbinz.
I hope this helps.
